Question

The speed of light in air is 3 × 108 m/s and in glass it is 2 × 108m/s. What is the

refractive index of glass? If refractive index of diamond is 2.42 what is the

speed of light in the diamond?​

Answer 1

Explanation:

According to Snell's Law:

sin r

sin i

=

n

1

n

2

=

v

2

v

1

and Refractive Index for air is ≈1

Substituting,

1

1.5

=

v

2

3×10

8

Therefore, v

2

=

1.5

3×10

8

=2×10

8

m/s