Question

Determine the refractive index of a certain type of glass in which the velocity of light is 2.40 x 10^8 m.s^-1

Answer 1

as you know
RI of any medium = c/v ,where c= velocity of light in air and v= velocity of light in medium
applying it here
RI = 3*10^8/2.40 x 10^8
= 1.25

Answer 2

thank you so much again @nikks1992

Answer 3

Well keep asking :)