The frequency order for γ-rays (b), X-rays (a), UV-rays (c) :

9 2000 AIPMT Electromagnetic WavesElectromagnetic Spectrum Easy
The frequency order for $\gamma$-rays (b), X-rays (a), UV-rays (c) :
A b > a > c
B a > b > c
C c > b > a
D a > c > b

Detailed Solution

In the electromagnetic spectrum, frequency increases as wavelength decreases.
Order of frequency: $\gamma$-rays $\gt$ X-rays $\gt$ ultraviolet rays.
With the given labels: b ($\gamma$) $\gt$ a (X-rays) $\gt$ c (UV).
So the order is b > a > c.

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