An observer is moving with half the speed of light towards a stationary microwave…

PHYSICS · Single correct · A Level · Physics · Turning points in physics · Turning points in physics

Problem

An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency

10 \text{ GHz}

. What is the frequency of the microwave measured by the observer? (speed of light

= 3 \times 10^8 \text{ ms}^{-1}

) [Main 2017] (1)

17.3 \text{ GHz}

(2)

15.3 \text{ GHz}

(3)

10.1 \text{ GHz}

(4)

12.1 \text{ GHz}