What is the refraction of light and its relevance in Bsc physics?

[Heather Donahue]

I am studying Bsc physics. Edit by mod: removed spam Please give me the details about the above question.

 

[Evo]

What has your research into this found? Where are you stumped? I wouldn't think it would be that hard to find, unless you just came here to post that spam I deleted.