Question

The speed of light in transparent medium is 2.4 x 10⁸ m/s. Calculate absolute
refractive index of the medium.​

Answer 1

The refraction index, n, of a transparent medium is defined as the ratio of speed of light in vacuum to the speed of light in that medium. The formula is n=

v

c

.

where the speed of light c=3×10

8

m/s and v is the speed of light in the desired medium which is given as v=2.4×10

8

m/s.

Therefore, n=

2.4×10

8

m/s

3×10

8

m/s

=1.25.

Hence, the refractive index of the transparent medium is 1.25.

hope it helps