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Sparking Brilliance of Diamond: Th...

Sparking Brilliance of Diamond:

The total internal reflection of the light is used in polishing diamonds to create a sparking brilliance. By polishing the diamond with specific cuts, it is adjusted the most of the light rays approaching the surface are incident with an angle of incidence more than critical angle. Hence, they suffer multiple reflections and ultimately come out of diamond from the top. This gives the diamond a sparking brilliance.
A diamond is immersed in a liquid with a refractive index greater than water. Then the critical angle for total internal reflection will

A

depend on the nature of the liquid.

B

decrease.

C

remains the same.

D

increase.

Text Solution

Verified by Experts

The correct Answer is:
D
A diamond is immersed in a liquid With a.refractive index greater than, water. Then the critical angle for total internal reflection will increase.
This is because , as teh refractive index of outer medium increases, the refracted ray bends less away from normal. So, angle of incidence more to achieve `90^@` angle of refraction.
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