Quantum physics Definition and 729 Threads

I am looking for a book containing a concise treatment of Quantum Physics at the level of Resnick and Brehm. I find these two books to be a bit wordy. Any suggestions are much appreciated. Thank you very much for your help.

here is the question. Researchers want to construct a scattering experiment using a powerful source of 5.5 MeV alpha-particles to scatter from a gold foil. They want to be able to count 1 particle/s at 50 degree. Their detector subtends a small angle and is limited to a maximum count rate of...

Hello everybody, I got two questions on my assignment that I am stuck on...it'd be great if you guys can give me some hints to get me in the right direction. :smile: 1) Using the uncertainty principle, find the minimum value (in MeV) of the kinetic energy of a nucleon confined within a...

hi well i am basically really liking the idea of quantum physics and find it real interesting, and think i want to do it for a degree (either that pure maths or cosmoslogy), but don't know where to begin>? i havnt even started A-levels yet, but would like to get a head start cause i...

Hi, I am a sophomore physics major taking Introduction to Quantum Physics and I was wondering how in the world to study for my final that is coming up in a few days. I really find the subject interesting, but when it comes to studying, I do not even know where to begin. Our final is going to...

Hallo, Thesedays I am looking for some comprehensive resources for studying Quantum Physics. Since I am not a physicist, I don't have very good understanding for Quantum Physics. I have been searching the internet for Quantum Physics but so far I could find any comprehensive material on...

Quantum Physics -- Calculating Commutators The problem states: Calculate the commutators [x,Lx], [y,Lx], [z, Lx], [x, Ly], [y, Ly], [z, Ly]. Do you see a pattern that will allow you to state the commutators of x, y, z with Lz? Unfortunately, the book that is asking this question is very...

:shy: hi to everyone i´m new on this forum but i love quantum physics i´m currently studying at high school but is my last year and i would like to study quantum physics can anybody help me find a good university that offers quantum physics as a career no mater where it is please help me :shy:

I have just read that Schrödinger had wrote six research papers ( in 1926) in which he presented the complete mathematical foundation of nonrelativistic quantum mechanics . Also read that De Broglie supported his proposal (the duality) by a proof derived from relativity theory . Are these...

This is for problem 2.5 in griffiths text basically they say that the wave function as Capital Si (x,0) = A (si1(x) + si2(x), where si1 and si2 are equal to the first two stationary states of an infinite square well. i need to get Cn..my normalization constant is sqrt(2)/2..and I'm using...

What is the relationship between Quantum Physics and electromagnetic frequencies?

Guys, i have planned time after time to go to college for Quantum Physics and I'm in my senior year of high school, so i have to start thinking really hard now. i recently got an invitation to a reception for MIT (the reception is in Atlanta Georgia for me) and i don't know if i'll go or not...

Hi everybody, First, I want to excuse myself for the mistakes in this message (and in the others that I will write), because I am not an english speaker and I am not accustomed to write in english. It is the reason why I come here, to improve my English :smile: . If I make a big mistake, I...

Hi all, I was reading John Gribbins book In search of shroedingers cat yesterday, and it got me thinking, I`m about to embark on a open university Degree in Physics. If you became specialised in quantum physics then what kind of jobs or career propects would you have, There are many jobs...

Hi again, Could someone explain a tiny bit about Balmer Lines to me? If I was asked what is the difference between the red Balmer Lines in Hydrogen and Deuterium, where would I begin? How do I know which energy level the electrons are in? If it's a red Balmer Line then I guess n = 2 for...

Haaaaaaay every body I want to ask about the Quantum Physics What is the Quantum talk about ?and how can I study and understand it?? Can I have answers ... Please:smile:

What is the significance of Quantum physics to spirituality?

hi. I am not a physicist and i have a question about quantum physics. If you shoot electrons towards a double slit and record what happens on the otherside. If you then burn the recording without ever watching it - would the electron act as if it wasnt being observed?

I was wondering if modern physics considers quantum mechanics that follows from the hysenberg principle to be actually the way the universe functions, or simply that it is the extent of what we can possibly know with observation. I mean it seems to me that most of quantum mechanics is saying...

so cud anyone please tell me wot kind of careers u can get from studying quantum physics in college, despite teaching? thanks

Does anyone know which is the smallest possible number n in order to take place (in free space) the following reaction: e+ + e- ---> nγ

How do we describe wave in Quantum Mechanics? Is it different from classical physics?

I am doing an English report for school and I am going over a lot of the basic theories of quantum mechanics. I was wondering if someone had a list of a lot of technological things made possible after the discover of quantum theory. I'd appreciate any help. Thanks a lot friends.

math is must commonly used in astrophysics and quantum physics? This might be a stupid question. Not sure

Hello, 1)I want to prove that the number of photons emitted per unit of surface of black body, per unit of time and per unit of space of frequency is: n(v,T)=(2*π*v^2)/[c^2*exp(h*v/k*T) - 1] Any ideas?! :rolleyes: 2)How can I find the wavelength as a function of the kinetic energy...

May I know what are the careers which are related with quantum physics?

hey everyone, i have a question I'm trying to solve here for class any help would be SO apreciated ! "In the Davisson-Germer experiment, 54.0-eV electrons were diffracted from a nickel lattice. if the first maximum in the diffraction pattern was observed at 50 degrees (as in the figure)...

:confused: Hello, i am new to quantum physics, i guess if someone could give me some advice about it, like websites, books or other types of information about quantum physics, as well as the basic physics and maths required to understand it...

I've been thinking about the difference between quantum physics and quantum mechanics. What are the difference? Is quantum physics just a subfield name, and within that there are quantum mechanics and quantum field theory etc. or are all of these three independent subfields of physics?

anyone know of a good quantum physics textbook?

A 1.5kg mass vibrates at an amplitude of 3cm on the end of a spring of spring constant 20N/m (a) If the energy of the spring is quantized, find its quantum number. (b) If n changes by 1, find the fractional change in energy of the spring. I have solved part (a) but I could not solve part...

Hey, I'm not a physicist at all, but I am aware of how good some crackpots are of getting media attention. I was just wondering if this has any legitimacy at all: http://www.guardian.co.uk/science/story/0,3605,1627424,00.html Does someone have a more detailed article about this theory...

I am having trouble with 2 problems about the harmonic oscilator. I realize this isn't the homework section, however I feel that in my situation where time is limited, perhaps someone would be able to give me a certain amount of leeway. First of all the question tells me to use the wave...

In quantum physics light is considered both (or neither) a probability wave and a photon. But where does the eletromagnetic wave come into the scheme of things in quantum physics? Is the electomagnetic wave merely an approximation to many different types of discrete photons (ranked by their...

I have this debate with my colleges several times and I can't stress how much I would like to get this settled. Quantum Mechanics is STRICTLY done by math. While quantum physics could be any where from the general therios which you experiment and debate and do all kinds of scientist like stuff...

Hello everyone! I recently discovered this wonderful forum while searching for references for an upcoming film I'm currently working on. I know this is going to sound like a strange request, but I'm looking for anyone interested in being a science advisor for our film. Before anyone gets too...

A proof of RH using quantum physics...:) Here you are a proof of Riemann hypothesis, using quantum physics,first we associate the roots of the Riemann function \zeta(1/2+is) with the energies of a certain Hamiltonian with potential V and we prove v is real so all the energies will be real and...

Hi quantum people :smile: , I am so interested in quantum physics. I want to study this subject on my own. I have taken these math classes: Pre-Calculus Calculus I Calculus II Calculus III Differential Equations Linear Algebra Probability and Statistics And these physics courses...

HELLO FRIENDS, I am rakesh an student of quantum physics... LAST week i had a presentation on quantum physics this is a PPt of my talk...just have a look... n do reply...

Hi All, I’m sorry if this is a silly question, but can someone please tell me what the difference between Quantum physics and Quantum Mechanics is? Thanks Warrick

is messiah quantum physics textbook good? is it recommended?

My questions are next: 1.What would happen if you try to travel with spacecraft exactly at the speed of light? Yes, I do know that when spacecraft trie to reach the speed of light its mass will increase immensely...,my question is what would happen to the spacecraft that is trying to...

I read on some physics website somewhere (I forgot which one) that a magnetic field around a bar magnet exists because there is a tiny probability that some electrons exist outside the bar magnet and when they do they emit virtual photons that can interact with other things to create the...

i'm a green hand in this field,maybe the question i asked is droll,but i want to know some wonder thing about quantum physics. i know that one dimensional potential trap can be reckoned from Schrodinger equotion, but what about the actually fact? How dose one dimensional potential trap form...

http://arxiv.org/abs/quant-ph/0505187 Quantum Physics from A to Z Authors: M. Arndt, M. Aspelmeyer, H. J. Bernstein, R. Bertlmann, C. Brukner, J. P. Dowling, A. Ekert, D. M. Greenberger, M. A. Horne, T. Jennewein, P. G. Kwiat, J.-W. Pan, E. M. Rasel, H. Rauch, T. G. Rudolph, C. Salomon, A...

My husband wants to teach himself quantum physics. What books do you recomend? I want to get him a few for his birthday. Thanks

To those who come close to understanding the quantum world, what does it mean to you? I mean what difference has it made in your view of the universe? I understand that people have interpreted it in many ways, and not everyone agrees, but there must be some general consensus about what it's...

In a photoelectric experiment, light is incident on a metal surfact. Photoelectrons are ejected, producing a current. A reverse potantial is applied and adjusted until the current drops to 0 (this is called the stopping potential). This fata is collected for stopping potentials (listed first)...

Quantum Physics... And you thought this thread was going to be serious. Anyway ... finally, today quantum physics was started in my college lectures. Most people in the room hated the sound of it but I was ready to go. After the lesson my friend said 'I didn't realize quantum physics...

Hi A huge problem I'm finding with my study of QM is that its shrouded in maths and I'm becoming really bogged down in trying to understand things like hermite polynomials, assosiated legendre polymials, bessels and laguerres equations and so on. In the process, I feel that I'm loosing sight...