Name the electromagnetic waves which are produced by the following: (i) Radioactive decays of nucleus (ii) Welding arcs (iii) Hot bodies Write one use each of these waves.

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TextElectromagnetic Spectrum and Its RegionsInfrared Waves and Their UsesUltraviolet Rays and Their UsesGamma Rays and Their UsesCBSE PYQ

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(i) Long distance radio broadcasts use short-wave bands. Why ? (ii) Optical and radio telescopes are built on the ground, but X-ray astronomy is possible only from satellites orbiting the Earth. Why ?

TextElectromagnetic Spectrum and Its RegionsX-rays and Their Uses

Electromagnetic waves with wavelength 10 nm are called :

MCQ (Single)