Question

2. Prove the following statements
a. If the angle of incidence and angle of emergence of a light ray falling on a glass slab are i and e respectively, prove that. i= e.
b. A rainbow is the combined effect of therefraction,dispersion, and total interalreflection of light.
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Answer 1

Answer:

a. Let u be the refractive index of the glass slab

Then according to Snell's law...

sin i/ sin r1 = u

And

sin r2/ sin e = 1/u

But r1=r2

Putting iii in i we have

sin i/ sin r2= 1

or. i = b

b. Picture shared above.

Explanation:

u is referred to mew

Hope it helps

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