Transmission Of Heat Question 162

Question: Which of the prism is used to see infra-red spectrum of light

[RPMT 2000]

Options:

A) Rock-salt

B) Nicol

C) Flint

D) Crown

Show Answer

Answer:

Correct Answer: A

Solution:

Ordinary glass prism (crown, flint) absorbs the infrared radiation but rock salt prism transmit them. Hence it is used to obtain the spectrum of infrared radiation.

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