• Register
PhysicsOverflow is a next-generation academic platform for physicists and astronomers, including a community peer review system and a postgraduate-level discussion forum analogous to MathOverflow.

Welcome to PhysicsOverflow! PhysicsOverflow is an open platform for community peer review and graduate-level Physics discussion.

Please help promote PhysicsOverflow ads elsewhere if you like it.


PO is now at the Physics Department of Bielefeld University!

New printer friendly PO pages!

Migration to Bielefeld University was successful!

Please vote for this year's PhysicsOverflow ads!

Please do help out in categorising submissions. Submit a paper to PhysicsOverflow!

... see more

Tools for paper authors

Submit paper
Claim Paper Authorship

Tools for SE users

Search User
Reclaim SE Account
Request Account Merger
Nativise imported posts
Claim post (deleted users)
Import SE post

Users whose questions have been imported from Physics Stack Exchange, Theoretical Physics Stack Exchange, or any other Stack Exchange site are kindly requested to reclaim their account and not to register as a new user.

Public \(\beta\) tools

Report a bug with a feature
Request a new functionality
404 page design
Send feedback


(propose a free ad)

Site Statistics

205 submissions , 163 unreviewed
5,054 questions , 2,207 unanswered
5,347 answers , 22,726 comments
1,470 users with positive rep
818 active unimported users
More ...

  The reason for light refraction in subatomic level

+ 0 like - 0 dislike

Can someone explain the reason for light refraction in subatomic level?

asked Oct 25, 2018 in Theoretical Physics by Vahid [ revision history ]

What is "light fracture"?

sorry i meant light refraction :D @MitchellPorter 

@VladimirKalitvianski thanks for your answer but now i have another question.

it may sound very silly as any other new question in science.

what would happen if we had 6 quarks in protons and neutrons instead of three?

what would happen then to light refraction ?

and is this situation even possible?

Proton is a rather compact particle - its "size" is much smaller than any photon wavelength, so normally a photon "sees" a point-like charge $+1$. The proton internals do not participate in photon scarttering separately; rather, they are tightly bound and do not change their initial state. There are heavy particles with more quarks: it is a deyteron, tritium, Helium_3, Helium_4, and the other heavier nuclea. They all act as point charges while photon scattering due to too tight coupling of quarks inside, so normally a photon does not "excite" a nucleus. There are exclusions (see Moessbauer effect), but for your purposes it is well sufficient to consider the nuclea and electrons as point-like charged particles affected with a photon electromagnetic field. It is atomic, molecular, and condensed meduim constituents who "refract" the photon because the binding energy in them is comparable with that of photon.

Your answer

Please use answers only to (at least partly) answer questions. To comment, discuss, or ask for clarification, leave a comment instead.
To mask links under text, please type your text, highlight it, and click the "link" button. You can then enter your link URL.
Please consult the FAQ for as to how to format your post.
This is the answer box; if you want to write a comment instead, please use the 'add comment' button.
Live preview (may slow down editor)   Preview
Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
If you are a human please identify the position of the character covered by the symbol $\varnothing$ in the following word:
Then drag the red bullet below over the corresponding character of our banner. When you drop it there, the bullet changes to green (on slow internet connections after a few seconds).
Please complete the anti-spam verification

user contributions licensed under cc by-sa 3.0 with attribution required

Your rights