Question

answer it fast it's urgent ​

Answer 1

Answer:

option (d)

Explanation:

assertive : refractive index= 1:1 there fore no net force and movement applied

Answer 2

Answer:

(a) is correct.

Both assertion and reason are correct and reason exactly explains assertion.

Refractive index has no units because it is a ratio. No ratio has units.

It is also a ratio of similar quantities, namely- velocities.

Refractive index (μ) = c/ v

( where c= speed of light in vacuum = 3 × 10⁸ m/s and v= speed of light in given medium )