Question

Statement I: Only microwaves are used in radar.
Statement II: Microwaves have very small wavelength.

• A. If both statements are true and statement II is the correct explanation of statement I.
• B. If both statements are true but statement II is not the correct explanation of statement I.
• C. If statement I is true but statement II is false.
• D. If both statements are false.

Answer 1

Answer: (A)

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