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Assertion: Only microwaves are used in r...

Assertion: Only microwaves are used in radar.
Reason: Because microwaves have very small wavelength.

Text Solution

Verified by Experts

In a radar, a beam signals is needed in particular
direction which is possible if wavelength of
signal wave is very small. Since the wavelength
of microwaves is a few millimetre, hence they
are used in radar.
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