CBSE Class 12 · 2016 · Delhi · EM WavesVery Short Answer

Why are microwaves considered suitable for radar systems used in aircraft navigation?

Solution

Microwaves have wavelengths of the order of a centimetre, so they can be sent out as a narrow, well-collimated beam.
This short wavelength is strongly reflected by metallic aircraft, and the reflected pulse can be timed precisely, giving accurate direction and range.

short wavelength \to sharp, strongly-reflected beam

CBSE Class 12 Board · 2016 · Delhi · Subjective

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