Question

The frequency of waves emitted from a radar is
750 MHz. The frequency of reflected wave from
the aeroplane as observed at the radar station is
increased by 2.5 KHz.The speed of aeroplane is?

Answer this with perfect
explanation

Those who give unwanted answers will be marked as scam​

Answer 1

Answer:

500 m/sec

Explanation:

doppler frequency equation is

fᴰ = 2Vᵣ/λ

Where fᴰ is Doppler shift= 2500

Vᵣ is radial velocity

λ is wavelength

In the given question

frequency is 750MHz Hence wavelength is

$\frac{3 \times 10 ^{8} }{750 \times {10}^{6} } = 0.4$

Substituting we have

$2500 = 2 \times v \div 0.4 \\ v = \frac{2500 \times 0.4}{2} = \frac{1000}{2} = 500$