Question

The index of refraction of diamond is 2.0. The velocity of
light in diamond is approximately
(a) 1.5 × 10¹⁰ cm/sec (b) 2 × 10¹⁰ cm/sec
(c) 3.0 × 10¹⁰ cm/sec (d) 6 × 10¹⁰ cm/sec

Answer 1

Answer:

The answer is

(a) 1.5 × 10¹⁰ cm/sec

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Answer 2

Answer:

1.5 ×10^10 cm /s

Explanation:

Given: the index of refraction of diamond is 2.0

To find the velocity of light in diamond in cm/second

Solution:

We know,

Refractive index of diamond=

velocity of light in diamond

Velocity of light in air

⟹2=

velocity of light in diamond

3×10

8

⟹velocity of light in diamond=

2

3×10

8

=1.5×10

8

m/s

But we need velocity in cm/s.

Therefore, velocity of light in diamond = 1.5×10

8

×10

2

=1.5×10

10

cm/s