Question

answer this question

Answer 1

The absolute refracting index is defined as the ratio of speed of light in one as compared to speed of light in vaccum

1).so (2×10^8)/speed of light in vaccum=4/3

so on solving

speed of light in vaccum is 1.5×10^8

2) now speed of light in water/1.5×10^8=3/2

so on solving

speed of light in water=2.25×10^8

hope it helps