Question

give answer quickly of a and b​

Answer 1

Answer:

n1 sini = n2 sin r

n1 = C/V1

n2 = C/V2

n1/n2 = V2/v1

Answer 2

Answer:

a. The laws of refraction are:

1.  The incident ray,the refracted ray, and the normal lies in the same plane.
2. When light enters from one medium to another medium,then   from Snells law:  μsinθ=constant.(μsin i=μsin r)

b.    n₁=c/v₁,

      n₂=c/v₂

     ∴₁n₂=n₁/n₂

      n₁/n₂=(c/v₁)/(c/v₂)

              =v₂/v₁

Explanation: