Sound WavesHard

Question

Microwaves from a transmitter are directed normally towards a plane reflector. A detector moves along the normal to the reflector. Between positions of 14 successive maxima, the detector travels a distance 0.14m. If the velocity of light is 3 × 108 m/s, find the frequency of the transmitter : -

Options

A.1.5 × 1010 Hz   
B.1010 Hz   
C.3 × 1010 Hz   
D.6 × 1010 Hz   

Solution

7λ = 0.14 ; λ = 0.02
f = = 1.5 × 1010 Hz

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