Microwaves are used in RADAR.Why?

The question given below consist of an assertion (A) and a reason ( R). Use the following key to choose the appropriate answer to these questions from the codes (a), (b), ( c) and (d) given below: (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is NOT the correct explanation of A. (c) A is true but R is false. (d) A is false and R is also false. Assertion: Only microwaves are used in Radar. Reason: Because microwaves have very small wavelength.

Why parabolic mirrors are use in search light?

Which part of electromagnetic spectrum is used in operating a RADAR?

A concave mirror is used in opthalmoscope .Why?

What are microwaves?Wrie their two uses.

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