Introduction Definition and 855 Threads

I'm just a guy from Norway who is interested in physics, and my dream is to become a theoretical physicist someday. I'm looking forward to spend time on this site.

Hi, Can anyone explain or point to a good introduction in simple terms the concept of 'light propagation mode'? I am in my final year at high school and need to write a research report on how optical fiber communication systems work. The report needs to include some contents beyond what is...

i want a book that smoothly takes me from finite dimensional vector spaces to infinite dimensional vector spaces. Edit: I am doing this as self study, so i would prefer the book to be easy going without an instructor Thanks

Hey All I'm Portuguese, became acquainted with physics during elementary school, reading books and magazines around the house, namely Science&Vie and school manuals from elder family members. Physics, Chemistry, Maths and Universal History are my favorite topics. My first science book ...

I am inquiring about a good introductory statistics book or books, that supplement each other well. My math background consist of calculus 2, linear algebra, and ODE. This is for a first course in statistics. Also, what would be a good introductory number theory book? Or should I complete...

can anyone refer me to some good introduction to this O(N) model and also large N expansion. Thanks.

I've been searching high and low through the Google for a solutions manual to William Boothby's "An Introduction to Differentiable Manifolds and Riemannian Geometry" to no avail. Does anyone know if ∃ such a thing? Thanks.

New here, studied electronics engineering tech. My passion is really in theoretical physics (although I poses no formal schooling in the matter) and I signed up here to discuss news/questions, and also to occasionally help answer questions others have when I feel I'm capable.

For the show that never ends, I am so glad I can attend, my new friends my new friends. My name in irrelevant and I specialize in Pure logic. I live in Las Vegas Nevada and I am 57 years old born on Dec 18th 1957. I have 2 children in their early 20's living in California. I live alone...

hi all! I am Teng from China, a PhD candidate interested in mechanics and solid physics.

Hello Guys! I am very happy that I am going to participate in this forum :) I hope that I can help and share my little knowledge and I am looking forward to be helped and to be shared by your knowledge as well. Thank You! :D :)

I'm a beginning graduate student in string theory and I'm in the process of teaching myself algebraic geometry. I'm using lecture notes that go without mention of physics. I'm curious if there is a introductory book, or paper, or set of lecture notes that describes the application of alg...

Physics is a scary subject...

I'm really glad to join this community. I am going to study physics at university next year and I have loooooots of questions about my future career (I intend to be an astrophysicist), I hope I will find answers on this forum. I hope you're having great holidays :) !

I am looking for a good intermediate introduction to Euclidean Geometry. I have knowledge of ordinary differential equations (first course), elementary linear algebra, and multivariable calculus. My geometry foundation is rather weak and I would like to improve it. I purchased Kisselev...

Hi, my name is... well I hid it. I live in Germany for pursuing my master degree. I completed my undergrad in physics and now I found myself forgetting most part of quantum physics. So I hope everybody will help me out with my problem.

Hello world. I am Nüradh, I prefer to keep anonymous, but I'll explain a little bit I am Nüradh, I'm 20 years old and I currently study at high school, I have physics as my major subject. I've recently begun the second half of my time in high school, which brought about a lot more physics...

I'm an 11th grader in high school with a lot of free time and curiosity. Over the past years I narrowed my focus a bit too much into Biology/Chemistry but now I've decided that I have a definite interest in physics and that I'd like to self-teach it. Academic Background: I took an Intro to...

I just joined, to discuss some issues on simulation of semiconductor devices. I am actually a materials scientist turned into physicist and presently working on compound semiconductor device simulation using SILVACO TCAD commercial simulator. I will be soon posing my queries on a separate...

Hi guys, Basically I'm studying electricity at high school level and I need recommendation on a decent book that covers the basics on electricity as the official textbook misses a lot of detail and there's limited practice questions. I've been to several libraries but the books I've found, most...

I just wanted to introduce myself and tell you that my passion and interest is superconductivity and low temperature physics. If there is anyone in this field whether he or she works on experimental aspect or theoretical or computational, or just interested in this field, please let us know!

Hi! I have just decided to change my major, and am now pursuing a bachelor's degree in Physics. I am also working on a math minor. I'm interested in many fields in physics, and I am starting to develop ideas for my senior research paper and for my honors thesis. I am also working on applying for...

Hello! I am a new member. I am a retired Engineer very interested in Cosmology and Quantum Physics but no formal education in the later. I am a self-learner and have read many of the popular books written for the general public in these areas. I have a lot of questions and would appreciate...

Physics is my hobby, the nature of TIME is my main interest, i have some crazy ideas i would like to share and gain from your knowlegde, thanks for accepting me as a new member @adamyrifai

Hello, my name is Adn Agung Rochman Arifin, currently a student studying mechatronics in vocational high school 8 Malang, indonesia. I'm interested to learn and get a deep understanding in physics, so i hope i can learn much in this forum.

Homework Statement The bullet strikes a block of wood which exerts, on average, a force of 50,000N opposing the motion of the bullet. How far does the bullet penetrate? Mass of bullet = 25g Initial velocity of bullet = 350 m/s Final velocity of bullet = 0 m/s Homework Equations Ei+work=Ef K...

Hey Guys, Myself CaptCoonoor, Lover of Physics and somewhat other science's I always wanted to be in Community of Physics to discuss problems and help other people, I think this is the place I ever wanted to be.. Okay, I am also a Developer, Web --> Android... and In real life I am a science...

Author: Jonathan Lewin Title: An Interactive Introduction to Mathematical Analysis Amazon Link: https://www.amazon.com/dp/1107694043/?tag=pfamazon01-20

I'm a 2/3rd year undergrad physics student currently taking some time off for various reasons, and wanted to join the forum to supplement my independent study/ talk physics! My primary interests are astrophysics/ space exploration and mathematical physics and in my spare time I enjoy running and...

Just finished Leonard's lections on general relativity. Thriving with questions...

My name is Gary, I am engaged in general study and research in the areas of cosmology and quantum mechanics. Seeking a deeper understanding of the mathematics underlying the physical universe.

My last job was a flower farmer, 20ac. grower/distrib, Oregon. That's following a couple careers, Elec. eng. in toxic & combustible gas detection in chip manuf. & oil-gas industry. Houston/Chicago/Portland, OR. Tired of all of that, except the farming, now focused on supporting an electrically...

hi folks, my name is Jayyid a.k.a Blackreber from indonesia. Undergraduate student of Physics Education. Let's get to lab :)

Hello. I'm Bruno, a Brazilian High School graduate that loves high school (and everything I had the capacity to learn) Physics. I plan to pursue a career in Physics, and found some troubles. I did a post on this troubles first (as I didn't read my inbox :P), so if there is anyone out there who...

Greetings, My name is Henry Young and I am a layman in physics. But I have some really wild ideas about cosmology that need proving. Maybe I can get someone to prove them for me. For example, I think the universe actually started by ...

Hello, Can someone tell me how to derive: $$ grad\hat{\phi} $$ from: $$ \hat{P}= -:\int \mathrm{d³}x [\pi (x) grad\hat{\phi}(x)]: = \int \mathrm{d³}p [p a⁺(p)a(p)] $$ Are all vectors. Note normal ordering ":" is used. I want to understand well QFT and want to learn to do this calcs...

I am ar recently retired military officer with many interests. Liked your Forum. Was searching for groups that might be studying human/earth sustainability. Looking forward to reading, researching and posting comments.

Greetings, I am looking for a Introduction on quantum computers and algorithms such as shores algorithm(spelling may be wrong).The level of mathematics and QM is irelavent, thus integral calculation and nth degree differentail equation of any form are no problem. Any recommendations are apreciated.

I am having some problem with this attached question. I also attached my answer... My problem is the appearence of the term: 2 e (A \cdot \partial C) |\phi|^2 which shouldn't appear...but comes from cross terms of the: A \cdot A \rightarrow ( A + \partial C) \cdot (A + \partial C) In my...

In case anyone is interested in DQ I came across this, which is moderately accessible in parts. http://math.berkeley.edu/~alanw/242papers99/karaali.pdf Evidently Alan Weinstein (Berkeley faculty) was teaching a graduate course Math 242 back in 1999 and put this online for his students. If...

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