The frequency of X -rays; γ -rays and ultraviolet rays are respectively a, b and c then

Correct answer: A. a c Frequency range of γ -ray, b=10^ 18 -10^ 23 ~Hz Frequency range of X-ray, a=10^ 16 -10^ 20 ~Hz Frequency range of ultraviolet ray, c=10^ 15 -10^ 17 ~Hz a c

JEE Main 201226 MayOnline

Exam: JEE Main
Year: 2012
Date: 26 May
Mode: Online
Subject: Physics
Chapter: Electromagnetic Waves

JEE Main 2012 · 26 May · Online · Physics · Electromagnetic Waves

The frequency of X -rays; γ -rays and ultraviolet rays are...

The frequency of

X

-rays;

\gamma

-rays and ultraviolet rays are respectively

a, b

and

c

then

Options

A $a < b ; b>c$
B $a>b ; b>c$
C $a < b < c$
D $a=b=c$

Correct answer

A. $a < b ; b>c$

Step-by-step solution

Frequency range of

\gamma

-ray,

b=10^{18}-10^{23} \mathrm{~Hz}

Frequency range of X-ray,

a=10^{16}-10^{20} \mathrm{~Hz}

Frequency range of ultraviolet ray,

c=10^{15}-10^{17} \mathrm{~Hz}

\therefore a < b ; b>c

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