Q23 / 30 · NTA Abhyas (NEET) 2020 · Physics · Electromagnetic Waves

The frequency of $X$ -rays, Gamma rays and visible light wave rays are $a, b$ and $c$ respectively, then

Correct answer
A
$a < b, b > c$
B
$a < b, b < c$
C
$a > b > c$
D
$a > b, b < c$

Solution

The frequency of X-rays

a = 3 \times 10^{19}

to

1 \times 10^{16}

The frequency of Gamma-rays

b = 3 \times 10^{22}

to

3 \times 10^{18}

The frequency of visible light

c = 8 \times 10^{14}

to

4 \times 10^{14}

So,

b > a, b > c

Hence, the correct answer is option: 'A'.

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