Question

Light travelling from air enters the diamond and water. The refractive index of the diamond is 2.42 and water is 1.33 In which medium the light travels slow

Answer 1

Light travels slowly in a diamond as $v_{w} > v_{d}$

Explanation:

Given that,

μ  of diamond = 2.42

​μ  of water = 1.33

 

As we know,

Refractive index(​μ) = speed of light in air/speed of light in the medium

∵ ​μ ∝ 1/velocity in medium

So, light moves faster in the infrequent medium.

μ  of water(1.33)  > μ  of diamond(2.42)

∵ $v_{w} > v_{d}$

Thus, the light travels slowly in a diamond as water is a rarer/infrequent medium in comparison to a diamond.

Learn more: Refractive Index

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