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Ultraviolet Rays

It is produced by sun, special lamps and very hot bodies. Its frequency lies between 8 x 10^14 Hz to 5 x 10^…

Infrared Waves

It is produced by hot bodies i.e. vibrations of atoms and molecules. (Hence also called heat waves). It is no…

Microwaves

It is produced by spherical vacuum tubes (called Klystrons, Magnetrons and Gunn diodes) Its frequency range …

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