First slide

Electromagnetic spectrum

Question

The frequency 1057 MHz of radiation arising from two close energy levels in hydrogen belong to

Easy

A

radio waves
B

infrared waves
C

micro waves
D

$γ -rays$

Solution

v = 1057 MHz
$λ = \frac{c}{v} = \frac{3 \times 10^{8}}{1057 \times 10^{6}} m$
= 0.28 m = 28 cm (radiowaves)

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