An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency 10GHz . What is the frequency of the microwave measured by the observer? (speed of light = 3× 108ms- 1 )

Question

An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency 10GHz . What is the frequency of the microwave measured by the observer? (speed of light = 3× 108ms- 1 ) (A) 17GHz (B) 15GHz (C) 10.1GHz (D) 12.1GHz

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/p-zcvwwplbdtrvegqh.jpg" /> fapp=(1 + (V/C))f=(1 + (1/2))× 10(GH)2 (3/2)× 10=15GH2

Q. An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency $10 G Hz$ . What is the frequency of the microwave measured by the observer? (speed of light = $3 \times 1 0^{8} m s^{- 1}$ )

$17 G Hz$

$15 G Hz$

$10.1 G Hz$

$12.1 G Hz$

$f_{a pp} = (1 + \frac{V}{C}) f = (1 + \frac{1}{2}) \times 10 (G H)_{2}$
$\frac{3}{2} \times 10 = 15 G H_{2}$

Q. An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency 10GHz . What is the frequency of the microwave measured by the observer? (speed of light = 3×108ms−1 )

17GHz

15GHz

10.1GHz

12.1GHz