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

# Radio Waves Of Frequency 600 MHz Are Sent By A Radar Towards An Enemy Aircraft. The Frequency Of The Radio Waves 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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## Question

### Solution

Correct option is

Approaching the radar station with a speed 1.5 kms–1

If the aircraft is approaching the radar station with a speed u, the apparent frequency of radio waves received by the radar after reflection from the aircraft is given by

∴ Apparent increase in frequency is

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