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(a) Describe briefly how electromagnetic...

(a) Describe briefly how electromagnetic waves are produced by oscillating charges.
(b) Give one use of each of the following : (i) microwaves. (ii) ultraviolet rays.
(iii) infrared rays. (iv) gamma rays.

Text Solution

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(a) See Point Number 6 under the heading ..Chapter At A Glance...
(b) (i) Microwaves are used in radar system, in microwave ovens and for satellite communications etc.
(ii) Ultraviolet rays are used for LASIK eye surgery and to kill germs in water purifiers and hospitals etc.
(iii) Infrared rays are used in remote switches.
(iv) Gamma rays are used for radio therapy in cancer patients and for causing certain nuclear reactions.
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