Question

The speed of light in water is (3/4)th
of speed of light in vacuum. The
absolute refractive index of water is
1) 2/3
2) 4/3
3) 3/4
4) 5/3​

Answer 1

SPEED IN WATER = 3/4 SPEED IN VACCUM

SPEED IN WATER = 3×3×10^8÷4= 9/4×10^8

REFRACTIVE INDEX = SPEED IN VACCUM / SPEED IN WATER

REFRACTIVE INDEX = 4/3

Answer 2

Answer:

4/3

Explanation: