The radiation having maximum wavelength is :

Ultraviolet rays

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Radio waves

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X-rays

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Infra-red rays

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Solution

The correct option is A Radio waves
Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Radio waves have frequencies from 300 GHz to as low as 3 KHz and corresponding wavelengths ranging from 1 millimeter to 100 kilometers. Like all other electromagnetic waves, they travel at the speed of light.

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γ - r a y s

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(a) Arrange the following radiations in the order of their increasing wavelength :

X rays, infrared rays, radio waves, gamma rays, and microwaves.

(b) Name the radiation which is used for satellite communication.

10^{- 10} m

6800 \circ A

500 m

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