Electromagnetic Waves - Result Question 34

34. Which of the following, has the longest wavelength?

[1989]

(a) X-rays

(b) $\gamma$-rays

(c) microwaves

(d) radio waves

(c) $\gamma$-rays

(d) $\beta$-rays

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Solution:

  1. (d) Rays Wavelength

[Range in $m$ ]

X-rays $\quad 1 \times 10^{-11}$ to $3 \times 10^{-8}$

$\gamma$-rays $\quad 6 \times 10^{-14}$ to $1 \times 10^{-11}$

Microwaves $\quad 10^{-3}$ to 0.3

Radio waves 10 to $10^{4}$