CBSE Class 12-science Answered
Write any four
characteristics of electromagnetic waves.
Give two uses each of (i) radio-waves (ii) Micro-waves.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
Characteristic of electromagnetic waves are as follows: -
(i) They do not require any material medium for their propagation.
(ii) The oscillations of 
and 
are perpendicular
to each other and are in same phase.
(iii) They are transverse in nature.
(iv) They travel through vacuum with same speed, 
(i) Radiowaves are used
(a) in radiotransmission
(b) in radioastronomy.
(ii) Microwaves are used
(a) in microwave-ovens
(ii) in radar systems.
Answered by | 04 Jun, 2014, 03:23: PM
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