Electromagnetic Waves - Result Question 21

21. The energy of the em waves is of the order of 15 $keV$. To which part of the spectrum does it belong?

[2015 RS]

(a) Infra-red rays

(b) Ultraviolet rays

(c) $\gamma$-rays

(d) X-rays

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Solution:

  1. (d) Energy of $x$-ray is ( $100 ev$ to $100 kev)$

Hence energy of the order of $15 kev$ belongs to $x$-rays.