In space, a stationary light source emits green light at a frequency of 5.5010^14Hz. A spaceship approaches the light at a speed 1.5010^7m/s. What is the frequency of the light that is perceived aboard the spaceship. (the speed of light is 3.0010^8m/s) A. 6.0810^14Hz B. 4.9810^14Hz C. 5.5010^14Hz D. 6.77*10^14Hz

Question

Annika Bowman

Physics

23 November, 22:59

In space, a stationary light source emits green light at a frequency of 5.5010^14Hz. A spaceship approaches the light at a speed 1.5010^7m/s. What is the frequency of the light that is perceived aboard the spaceship. (the speed of light is 3.0010^8m/s) A. 6.0810^14Hz B. 4.9810^14Hz C. 5.5010^14Hz D. 6.77*10^14Hz

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Rachel Faulkner · Answer 1

A spaceship approaches the light at a speed 1.50*10^7m/s which is about 5% of light speed. So the green light will shift towards the blue end of spectrum due to "blue shift."

The frequency should be higher which rules out option B and C. Looking at the magnitude of change, the correct answer should be A. 6.08*10^14Hz,