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The electromagnetic waves used to purify water are
Name the parts of the electromagnetic spectrum which are (i) also known as 'heat waves' and (ii) absorbed by ozone layer in the atmosphere.
Which one of the following electromagnetic radiation has the least wavelength ?
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.
Electromagnetic waves of wavelengths λ₁, λ₂ and λ₃ are used in radar systems, in water purifiers and in remote switches of TV, respectively. Identify the electromagnetic waves, and
Write one source of each of them.
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