the speed of light in vacuum is 3.0 x 108ms-1. If the refractive index of a transparent liquid is (frac{4}{3}), then the speed of light in the liquid is
-
A.
0.44 x 10 8ms-1 -
B.
2.25 x 10 8ms-1 -
C.
3.0 x 10 8ms-1 -
D.
4.0 x 10 8ms-1 -
E.
4.33 x 10 8ms-1
Correct Answer: Option B
Explanation
n = (frac{text{speed in air }}{text{speed in water }})
(frac{4}{3}) = (frac{3 times 10^8}{v})
v = 2.25 x 10 8ms-1