Exams › SSC CGL (Prelims) › General

Which type of electromagnetic radiation has extremely short wavelengths (less than 10^-3 nm) and is produced by nuclear explosions, lightning, and radioactive decay?

1. Microwave
2. Infra-red
3. Ultraviolet
4. Gamma

Correct answer: Gamma

Solution

Gamma radiation has wavelengths shorter than 10^-3 nm (i.e., less than 1 picometer), the shortest in the electromagnetic spectrum. It is produced by nuclear processes including radioactive decay, nuclear explosions, and lightning. Microwaves, infrared, and ultraviolet all have much longer wavelengths.

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