Question

Light enters from air to glass having refractive index1.5 what is the speed of light in glass speed of light in vaccum is 3×10^8 m/s

Answer 1

n1/n2 = v/c

1/1.5 = v/3x10^8

v=2x10^8m/s

n1=refractive index of air

n2=refractive index of glass

v=speed of light in glass

c=speed of light in air