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SAYPhysics
Пакистан
Добавлен 10 май 2018
I am Shahid Ali Yousafzai, Professor of Physics at the University of Peshawar, Pakistan. My educational RUclips channel, SAYPhysics, is a specialized platform committed to providing free of cost extensive resources on Conceptual Physics, as well as undergraduate and graduate-level courses in the fields of Electrodynamics and Quantum Mechanics in Physics. Moreover, I extend support to research students in their academic pursuits by offering tutorials on the use of OriginLab software, which is an essential tool for data plotting and analysis, widely utilized worldwide. Additionally, I provide guidance on LaTeX, which is a prevalent software application for technical writing, commonly used for reports, articles, and theses. The channel also encompasses useful tips and tricks for Microsoft Office software applications like Word and Excel, which can be beneficial for students in their research work and technical writing endeavors.
L6.2 Problem 6.6 Detailed Solution Part (a) 2/2
#QuantumMechanics #Physics #Griffiths #QuantumPhysics #ProblemSolving #PerturbationTheory #Orthogonality #PhysicsStudent #QuantumStates #EnergyShifts
Board Image: drive.google.com/file/d/1WCthHH7Va-ir6qik-xuaf_KA2l2Fz0En/view?usp=sharing
Welcome to this detailed solution of Problem 6.6 from David J. Griffiths' Introduction to Quantum Mechanics (2nd Edition). In this video, we'll walk through the problem step by step, exploring the orthogonality of unperturbed states, matrix elements of the perturbation Hamiltonian, and energy shifts.
Problem Statement:
Let the two "good" unperturbed states be:
ψ₀₊ = α₊ψₐ₀ + β₊ψ_b₀,
where α₊ and β₊ are determined (up to normalization) by Equation 6.22 (or Equati...
Board Image: drive.google.com/file/d/1WCthHH7Va-ir6qik-xuaf_KA2l2Fz0En/view?usp=sharing
Welcome to this detailed solution of Problem 6.6 from David J. Griffiths' Introduction to Quantum Mechanics (2nd Edition). In this video, we'll walk through the problem step by step, exploring the orthogonality of unperturbed states, matrix elements of the perturbation Hamiltonian, and energy shifts.
Problem Statement:
Let the two "good" unperturbed states be:
ψ₀₊ = α₊ψₐ₀ + β₊ψ_b₀,
where α₊ and β₊ are determined (up to normalization) by Equation 6.22 (or Equati...
Просмотров: 83
Видео
L6.1 Problem 6.6 Detailed Solution Part (a) 1/2
Просмотров 128День назад
#QuantumMechanics #Physics #Griffiths #QuantumPhysics #ProblemSolving #PerturbationTheory #Orthogonality #PhysicsStudent #QuantumStates #energyshifts Board Image: drive.google.com/file/d/1WCthHH7Va-ir6qik-xuaf_KA2l2Fz0En/view?usp=sharing Welcome to this detailed solution of Problem 6.6 from David J. Griffiths' Introduction to Quantum Mechanics (2nd Edition). In this video, we'll walk through th...
L33.2 Multipole expansion: The electric field of a dipole
Просмотров 1 тыс.14 дней назад
#MultipoleExpansion #PhysicsLecture #ApproximatePotential Multipole expansion in this detailed lecture focuses on the approximate potential at large distances. Whether you're a physics student or an enthusiast, this video will help you understand the complex concepts of multipole expansion with clarity. Join us as we delve deep into the mathematics and physics behind this important topic. multi...
L33.1 Multipole expansion: The monopole and dipole terms
Просмотров 21021 день назад
#MultipoleExpansion #PhysicsLecture #ApproximatePotential Multipole expansion in this detailed lecture focuses on the approximate potential at large distances. Whether you're a physics student or an enthusiast, this video will help you understand the complex concepts of multipole expansion with clarity. Join us as we delve deep into the mathematics and physics behind this important topic. multi...
L32.2 Multipole expansion: Approximate potential at large distances P-II
Просмотров 168Месяц назад
#MultipoleExpansion #PhysicsLecture #ApproximatePotential Multipole expansion in this detailed lecture focuses on the approximate potential at large distances. Whether you're a physics student or an enthusiast, this video will help you understand the complex concepts of multipole expansion with clarity. Join us as we delve deep into the mathematics and physics behind this important topic. multi...
L32.1 Multipole expansion: Approximate potential at large distances P-I
Просмотров 196Месяц назад
#MultipoleExpansion #PhysicsLecture #ApproximatePotential Multipole expansion in this detailed lecture focuses on the approximate potential at large distances. Whether you're a physics student or an enthusiast, this video will help you understand the complex concepts of multipole expansion with clarity. Join us as we delve deep into the mathematics and physics behind this important topic. multi...
L31.2 Multipole expansion: Approximate potential at large distances - Example 3.10 P-II
Просмотров 208Месяц назад
#MultipoleExpansion #PhysicsLecture #ApproximatePotential Example 3.10 A (physical) electric dipole consists of two equal and opposite charges (±q) separated by a distance d. Find the approximate potential at points far from the dipole. Multipole expansion in this detailed lecture on Example 3.10, focusing on the approximate potential at large distances. Whether you're a physics student or an e...
L31.1 Multipole expansion: Approximate potential at large distances - Example 3.10 P-I
Просмотров 302Месяц назад
#MultipoleExpansion #PhysicsLecture #ApproximatePotential Example 3.10 A (physical) electric dipole consists of two equal and opposite charges (±q) separated by a distance d. Find the approximate potential at points far from the dipole. Multipole expansion in this detailed lecture on Example 3.10, focusing on the approximate potential at large distances. Whether you're a physics student or an e...
Quickly Find and Index XRD Peaks in GSAS: Step-by-Step Tutorial
Просмотров 7952 месяца назад
#XRDAnalysis #GSASTutorial #MaterialScience #ResearchTools #XRDPeaks #PeakIndexing #ScientificResearch #DataAnalysis #MaterialsCharacterization #crystalstructure 00:00 - Introduction and Preparing Files 00:30 - Importing XRD and Parameter Files 01:12 - Setting the Fitting Range and Finding Peaks 02:19 - Refining Peak Locations 03:05 - Indexing the Peaks Playlist of all Videos: studio.ruclips.ne...
How to Install GSAS-II for Free for XRD Data Analysis: : Step-by-Step Installation Guide
Просмотров 5682 месяца назад
#GSASII #XRayDiffraction #XRDDataAnalysis #FreeSoftware #OpenSourceSoftware #ScientificSoftware #DataAnalysis #Python #AnacondaPython #GSASInstallation #Tutorial #stepbystepguide 00:00 Introduction to GSAS-II 00:46 Downloading GSAS-II 01:30 Running the Installer 03:10 Completing the Installation 04:15 Running GSAS-II and Importing Data Playlist of all Videos: studio.ruclips.net/user/playlistPLe...
How to Export High-Resolution Graphs from GSAS-II: Step-by-Step Tutorial
Просмотров 5092 месяца назад
#GSASII #DataVisualization #ScientificPlotting #HighResolutionGraphs #GSASIITutorial #ExportGraphs #PublicationReadyPlots #DataAnalysis #ResearchTools 0:00 Introduction 0:25 Quick Export Method 0:37 Saving as PDF 1:18 Customizing the Export 1:26 Adjusting Text Size 2:00 Symbol Customization 2:55 Line Width Adjustments 4:08 Phase and Legend Modifications 5:05 Show/Hide Plot Elements 6:13 Color S...
Rietveld refinement of XRD data with known phases in GSAS
Просмотров 1,2 тыс.3 месяца назад
#xrd #rietveldrefinement #gsasii How to perform Rietveld refinement of XRD data with known phases in 00:00 Introduction to Rietveld Refinement 00:05 Data Overview: XRD Data and Instrument File 00:26 Setting Up GSAS: Saving Project and Importing Data 01:17 Configuring GSAS: Data Section Parameters 02:38 Initial Refinement Setup: Sample and Background Parameters 03:54 Instrument Configuration: Re...
Why do we need to define electric potential if there's already an electric field?
Просмотров 2433 месяца назад
#electrodynamics #sayphysics #griffiths Why do we need to define electric potential if there's already an electric field? What's the purpose of defining electric potential alongside an electric field? Why bother with electric potential when there's already an electric field? What's the point of having electric potential if there's already an electric field? Why define electric potential when th...
Why is the electric field of an infinite sheet of charges independent of r
Просмотров 3253 месяца назад
#electrodynamics #sayphysics #griffiths What makes the electric field of an infinite charged sheet unaffected by distance? Why does the electric field from an infinite charge plane stay constant regardless of distance? What causes the electric field of an endless charge surface to remain constant irrespective of distance? How does the electric field of an infinite charge distribution remain con...
How to fill or delete empty cells at once in MS Excel
Просмотров 2443 месяца назад
#ExcelTips #EmailConversion #DataManipulation Learn efficient data management in MS Excel with this comprehensive guide on filling or deleting empty cells in Excel. Discover time-saving techniques to streamline your workflow and ensure data integrity effortlessly. Master the art of handling empty cells swiftly, enhancing your productivity and proficiency in Excel.
How to convert names into email IDs quickly in Excel
Просмотров 3103 месяца назад
How to convert names into email IDs quickly in Excel
How to increase number of sections in table of contents
Просмотров 1764 месяца назад
How to increase number of sections in table of contents
L30.3 Separation of variables - spherical polar coordinates - Example 3.9
Просмотров 4314 месяца назад
L30.3 Separation of variables - spherical polar coordinates - Example 3.9
L30.2 Separation of variables - spherical polar coordinates - Example 3.8
Просмотров 3374 месяца назад
L30.2 Separation of variables - spherical polar coordinates - Example 3.8
How to separate first and last names quickly in Excel
Просмотров 2854 месяца назад
How to separate first and last names quickly in Excel
L30.1 Separation of variables - spherical polar coordinates - Example 3.7
Просмотров 3324 месяца назад
L30.1 Separation of variables - spherical polar coordinates - Example 3.7
L29.2 Separation of variables - spherical polar coordinates - Example 3.6 P-II
Просмотров 3394 месяца назад
L29.2 Separation of variables - spherical polar coordinates - Example 3.6 P-II
L29.1 Separation of variables - spherical polar coordinates - Example 3.6 P-I
Просмотров 4674 месяца назад
L29.1 Separation of variables - spherical polar coordinates - Example 3.6 P-I
L28.3 Separation of variables - spherical polar coordinates - P-II
Просмотров 3134 месяца назад
L28.3 Separation of variables - spherical polar coordinates - P-II
L28.2 Separation of variables - spherical polar coordinates - P-I
Просмотров 3484 месяца назад
L28.2 Separation of variables - spherical polar coordinates - P-I
L28.1 Separation of variables - Cartesian coordinates - Example 3.5 P-III
Просмотров 2524 месяца назад
L28.1 Separation of variables - Cartesian coordinates - Example 3.5 P-III
L27.4 Separation of variables - Cartesian coordinates - Example 3.5 P-II
Просмотров 2634 месяца назад
L27.4 Separation of variables - Cartesian coordinates - Example 3.5 P-II
L27.3 Separation of variables - Cartesian coordinates - Example 3.5 P-I
Просмотров 3184 месяца назад
L27.3 Separation of variables - Cartesian coordinates - Example 3.5 P-I
L27.2 Separation of variables - Cartesian coordinates - Example 3.4 P-II
Просмотров 3214 месяца назад
L27.2 Separation of variables - Cartesian coordinates - Example 3.4 P-II
L27.1 Separation of variables - Cartesian coordinates - Example 3.4 P-I
Просмотров 4314 месяца назад
L27.1 Separation of variables - Cartesian coordinates - Example 3.4 P-I
Thankyou sir for such a useful video... Kindly help me in plotting XRD Pole figure for crystal orientation imaging.
Thanks for the appreciation dear 😊 I'm sorry that I'm not an expert in your required field.
Thank you sir very much
You're welcome dear
mashALLAH.. stay safe sir
Thanks dear 😊
Great
Thanks dear 😊
Hi, Thank you for sharing. Is it possible to use this code for nanorods as well or it is just for spherical? because I ran it for my samples which are nanorods and I did not get a good fitting
Yes, you're right. It's good for spherical and spheroidal NPs. We're working on it to include other morphologies like nanorods, nancubes, and nanoflowers etc. Thanks
@@SAYPhysics Thank you so much.
@aminrashidi1581 You're welcome dear
this video cleared my worries on XRD. Thank you very much brother.
Glad to know that it was an informative. Thanks for the appreciation dear 😊
Thank you so much sir 🙏🏻🌷
You're most welcome dear 🙏
All of your videos are really helpful, jazak Allah khayran
Good to know dear. Thanks and Aameen
Assalam o alaikum sir! Sir if the material we have used for is amorphous and have indirect allowed transition so it is compulsory to plot energy vs 1/2?as 1/2 is for indirect
Wa Alaikum Assalam! Yes, for an amorphous material with an indirect allowed transition, it is important to plot \((\alpha h u)^{1/2}\) versus energy (\(h u\)) to determine the band gap accurately. This approach corresponds to the characteristic absorption edge of indirect transitions. Thanks
I plotted both the graphs for direct as well as indirect but as mentioned already that my material is having indirect band gap and I got perfect slope from the direct band gap graph...so what to do?? Should I opt for the direct or indirect??
@@SAYPhysics JazakAllah sir! May you live long and happy life Ameeeen
I will suggest to first check your calculations and then relate it with a trustworthy literature. Thanks
Thanks and Aameen dear.
thanks a lot ,I download but also ask me about serial number key
Please check your provided institutional email on which you'd have received the required information. Thanks
Your dedication to physics is amazing professor.
Thanks for the appreciation dear. It's good to have you as the first commenter always. Share it too dear
@@SAYPhysics Your words are honor professor. Regarding sharing, I have done so. Sorry for my late reply.
You are my favourite teacher
Thanks dear 😊
Sir I really have doubt about the accuracy of the current method due to the following reasons: 1. The crystalline peak regions manually marked may not represent the exact crystalline areas. So better to use peak fitting. 2. Sum of crystalline areas could be equal to the total area of the plot leading to almost 100% crystallinity for a semi-crystalline material. Similar results were observed by me during the similar calculations done by me. 3. Why not to initially subtract the amorphous area from the plot as the considered crystalline area specially in amorphous sample seems inaccurate. Could you please provide a reference for the current adopted method? I would appreciate your valuable comments. Thanks in advance
Thank you for your detailed feedback. You raise valid points about the accuracy of the manual marking of crystalline regions and the importance of peak fitting to avoid overestimating crystallinity. Subtracting the amorphous area first is indeed a more accurate approach. However, this is the usual way of calculation. While it's better to consider your suggestions and provide a reference for the method used in. Thanks again!
5:29 KEY NOTE IS THAT IT MUST BE 0 [AS IN THE STANDAD DEVIATION[] BCAUSE IF IT ISNT 0, EVEN IF 0.0001 THAT WILL NOT BE DEFINITE
Yes, you're right. Thanks for the input ☺️
4:11 the only reason we are asuming E as E and H as H is because that is what they represent. However if we had an equation, it would be different approach because if i had an equation in temrs of E.....so E**2 would be a whole different equation and (E)**2 would be awhole different equation its like saying (-2**2) which is -4 and (-2)**2 which is 4
Thanks for your valuable input dear 😊
10:28 for anyone confusedf for any complex notation, when we divide ANY complex notation, we typically multiply the conjugate ofit so ouir denominator is iHBAR and we would multiply the confugate of the complex notation so since i is the complex notation we would have [E PHI / IOTA HBAR] * [-IOTA / -IOTA] and do the cancellation
Thanks for the input dear 😊
Sir im in first year in iit bhu Your lecture really helped me God bless you sir❤❤
Thanks for the appreciation dear 😊. Aameen. Please share it with others too.
@@SAYPhysics definitely sir🙏🙏
@user-xp2hv6ht2j thanks dear
What is the complete name of the book? Please 🙏🏼
"Introduction to Electrodynamics' 3rd ed. By DJ Griffiths. Thanks
AOA Sir apki kuxh guideline chahiye
Yes dear. You may email me at sayphysics@gmail.com. Thanks
@@SAYPhysics thankx sir
@user-qt4hd5dr7v welcome dear
Great video! Why put spikes in the background and what does it mean? Is it correct to do this?
I don't know what do you mean by the spikes? Would you like to mention the angles at which you are observing the spikes. Thanks
Good evening... Could you please publish a video for us on the method of analyzing the plasma spectrum using the Origin program... It includes calculating the Debye temperature, electron density and other parameters, please... Because we are in dire need of this analysis, we are followers of your distinguished RUclips channel.
Thanks for the appreciation and positive comments. Yes sure. I'm planning to cover all these tutorials. Stay tuned.
@@SAYPhysics Thank you.. Okay, my dear, waiting for you
@ms.cmozahimazizalamery7880 you're most welcome
hello sir!after baseline correction,the xrd graph and ftir graph will be more smooth.However,after that,the former y value(intensity or the transmittance) will change.will that influence the analysis?
Thank you for your question! After baseline correction, the y-values (intensity or transmittance) can indeed change slightly. However, this adjustment is typically necessary to remove any background noise, ensuring that the data more accurately reflects the true signal. The changes in y-values shouldn't significantly affect the analysis as long as the baseline correction is done correctly. The corrected data should provide a clearer representation of the underlying features you're interested in. It's recommended to plot both actual and smoothed profiles.
@@SAYPhysics thanks!It helps a lot!!
@franksimon-jh9ls you're welcome dear
Sir the product key does not work what should I do please!
You'd have received your own product key on the official (institutional) email that you'd have provided during the download process. Thanks
Hello sir, i am working in MRL, now i have a need of origin, i watch your video, followed the instructions but when it comes to download origin page, it won't go further, some error proxy page appears..i tried a number of times but didn't helped
Write in Google 'originpro download, it will guide you to the download page where you click your desired download link. Thanks
informative video👍
Thanks dear
bobob
Thanks
Super
Thanks dear
Thank you for vedio. What are the acceptable values for reliability factors (Rp, Gof, etc.) if Rwp is 8, or should it be below 5?
Thank you for your comment! Generally, acceptable values for reliability factors like Rp, Rwp, and Gof can vary depending on the complexity of the sample and the quality of the data. An Rwp value around 8% can still be acceptable, especially if the data is complex. However, lower values (below 5%) are generally preferred for higher precision. It’s important to consider other factors like the goodness-of-fit (Gof) and the visual quality of the fit when evaluating the refinement.
welcome back
Thanks dear
thank you
Welcome dear
A good quality teacher needs to be master in his / her subjects and formulates must not be written by seeing reams of paper.
You're right. Thanks
Thank you for your explanation. I just have one more question. If my material is direct, should I use (F(R)hv)2 or (F(R)hv)1/2? It should be the former one according to the absorbance video but there is no specific explanation in the reflectance one. It should be the same right? Thank you!
sir i need your guidance
Yes dear
Love u sir. 2013 may hamin electrodynamics parhaty thy prevous may...abhi dubra ap k hi lecture follow karta hon.thank u sir..isi tarah master k courses parhaty rehy hamain intizar rehy ga plzz
Right dear. Thanks for your appreciation. Sure, we will cover all the courses IA.
I love your the videos you upload. They are Easy to understand. Thank you so much. Looking forward to chapter 4
Thanks for the appreciation dear 😊 Please share it with others too 🙏
great
Thanks dear
What to do if your trial expires after 6 months
You may ask for extension to Originlab, if they accept. Or can install the next year version. Thanks 👍
Upload quantum 2 lecture after chapter 5
Yes dear. From this Monday, upload will start in a new playlist Quantum Mechanics -II. Thanks
Hi. How can i find the prm file?
Please check the video description, I have provided link for downloading all the required files including the prm file. Thanks
This is v helping videos
Glad to know this. Thanks dear 😊
Thank you
Welcome dear 😊
Helpful video thank you so much sir
You're welcome dear. Share it with others too. Thanks
Sir can i get your whatsapp no i am bs physic student second semester from gc university hyderabad i want someone who can give me solid answer on doubt
Thanks for your contact. You may post your question on a specific video or any relevant video. I respond to it immediately. This way the response is available to all. Thanks
@@SAYPhysics Ok sir I am bs physics student second semester please recommend me best book for heat and thermodynamics and electricity and magnetism for theory
@@greatxd3063 For your BS Physics second semester: Heat and Thermodynamics: Zemansky & Dittman - Heat and Thermodynamics: A solid introduction to thermodynamics. Schroeder - An Introduction to Thermal Physics: Clear and engaging, covers thermodynamics and statistical mechanics. Electricity and Magnetism: Griffiths - Introduction to Electrodynamics: Widely used, clear explanations. Purcell & Morin - Electricity and Magnetism: Advanced, with a strong emphasis on physical understanding. Thanks
@@SAYPhysics Jazak'Allah sir ji
@@SAYPhysics Sar you are doing so great in RUclips but please upload the lectures of BS physics electricity and Magnetism course because you are uploading or you have uploaded the lectures of electrodynamics but not the lectures of electricity and Magnetism because for BS physics to understand electrodynamics carefully he or she should have understood the concepts of electricity and Magnetism first
Thanks for your very helpful video. I cannot find the website for downloading the WinXPO. Do you have its link? is it free? I am a student. Thanks.
Thanks for the appreciation dear 😊 Here's the website for WinXPow, however, it's not free. stoe-winxpow.software.informer.com/ In case you would like to perform XRD data analysis for free, I have the following playlist of tutorials based on GSAS-II. Thanks XRD Data Analysis in GSAS-II: ruclips.net/p/PLeWSImvDbplc_AZQn7PBr94AQCNnO9POu
❤❤
Thanks dear
Excelllent way to deliver such difficult topics ❤❤
Thanks for the appreciation dear 😊. Share it with others too.
hello sir,what the baseline will improve and why should we do a baseline correction?
Baseline correction in X-ray diffraction (XRD) data is important because it removes background noise and artifacts, which can obscure or distort the true diffraction peaks. This correction enhances the accuracy and reliability of the analysis by ensuring that peak intensities and positions are correctly identified, leading to more precise characterization of the material's crystal structure and phase composition. Thanks
@@SAYPhysics thanks so much!
@franksimon-jh9ls you're welcome dear
How can I do it for several curves on the same graph?
Please see the following videos for doing it for many curves at once. Thanks ruclips.net/video/1ZiDJ3NZnL8/видео.html ruclips.net/video/WX_X3XlbKRA/видео.html
Dear respected professor. May I ask about how much time do you put in preparation for each video? I ask this question becasue first, I am curious, and second, because I aspire to be a physics professor in future. I hope you may have time to consider my question. With all respect
Usually the time is 3X the actual recording. Recording+Editing+Sharing. The lecture preparation time isn't included in it. Good luck for your ambitious. Thanks
Like🎉
Thanks dear.
With all the mouse shaking and no sound it looks like some weird pantomime...
You're right. In the next video in the same playlist, I have added audio to this video. Thanks 👍