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Physics - Wave on String Question with Solution | TestHub

PhysicsWave on StringWavesMedium2 minQB

PhysicsMediumsingle choice

Radiowaves of frequency 600 MHz are sent by a radar towards an enemy aircraft. The frequency of the radiowaves reflected from the aircraft as measured at the radar station is found to increase by 6 kHz. It follows that the aircraft is:

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Answer:

Solution:

A frequency increase means approach. For reflection $Δ f / f = 2 v / c$ , so $v = \frac{c Δ f}{2 f} = \frac{3 \times 1 0 ^{8} \times 6 \times 1 0 ^{3}}{2 \times 6 \times 1 0 ^{8}} = 1.5 \times 1 0^{3}$ m/s.

Stream:JEESubject:PhysicsTopic:Wave on StringSubtopic:Waves

⏱ 2mℹ️ Source: QB

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