Are the rays parallel after they come out of the prism?

[zade70]

Homework Statement

Two rays of light fall on a surface of the prism. Do they remain parallel after they come out from the prism?

Homework Equations

sina/sinb=n2/n1

The Attempt at a Solution

I think they do, as the incidence angles are equal, the refraction angles are equal they become incidence angles which are still equal and will have equal refraction angles.

 

[blue_leaf77]

They will remain parallel only if they have the same wavelengths.

 

[zade70]

They will remain parallel only if they have the same wavelengths.

We are studying at the light just in the geometrical aspect. Can you give me a hist to solve it basing on it?

 

[blue_leaf77]

We are studying at the light just in the geometrical aspect.

Then I guess the lecture currently still assume monochromatic (single wavelength) case and of course your answer should be correct.