Question

explain this please​

Answer 1

Answer:

Refractive index = c/v

1.25 =( 3×10^8 )/v

v = ( 3×10^8 )/ 1.25

v = 2.4 × 10^8

option b is the correct answer.

Hope it helps..

✌

Answer 2

Answer:

answer is 24×10^8

Explanation:

3×10^8÷1.25=24×10^8