52 The frequency of a radar is 780MHZ The frequency of reflected wave from an aeroplaneis increased by 2 6KHz - Physics - Electromagnetic Waves

Question

52 The frequency of a radar is 780MHZ The frequency of reflected
wave from an aeroplaneis increased by 2 6KHz The velocity of the
aeroplane is

Pratyay Ghosh · Accepted Answer

ν'=c+vc-vν⇒ν'-ν=c+vc-v-1ν⇒Δν≈2νvc⇒v=cΔν2ν=3×108×2
6×1032×780×106=0 5×10 m/s

52.The frequency of a radar is 780MHZ.The frequency of reflected wave from an aeroplaneis increased by 2.6KHz.The velocity of the aeroplane is