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Ultravoilet Rays

Frequencies o...

Question

Frequencies of various radiations are given as
$f_{v} \to$ Visible light
$f_{r} \to$ Radio waves
$f_{U V} \to$ Ultra Violet waves
Then which of following is true?

A

f_{U V} < f_{v} < f_{r}

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B

f_{r} < f_{v} < f_{U V}

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C

f_{v} < f_{r} < f_{U V}

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D

f_{U V} < f_{r} < f_{v}

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Solution

The correct option is C $f_{r} < f_{v} < f_{U V}$
Increasing order of frequency of electromagnetic spectrum is given by :
Radio waves < Micro waves < Infrared < Visible < UV < X-rays < Gamma rays.
So, $f_{r} < f_{v} < f_{U V}$
Thus correct answer is option B.

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