Which among the given radiations has the highest wavelength and can be used for radio and television communications?

X-ray radiations

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Radio waves

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Ultraviolet radiations

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Infrared radiations

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Solution

The correct option is B
Radio waves

All the radiations in the sunlight are a part of wide spectrum known as electromagnetic spectrum, which subsumes visible light, as well as invisible radiations such as gamma rays, X-rays, ultraviolet rays, infrared light, microwaves and radio waves.

Among these radiations, radio waves have the highest wavelength (more than 0.1 m). They show all the properties of electromagnetic radiations. And they are used for very high-frequency radio transmission and ultra high-frequency television transmission.

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