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Two starships, the Enterprise and the Constitution, are
Chapter 25, Problem 22P(choose chapter or problem)
Problem 22P
Two starships, the Enterprise and the Constitution, are approaching each other head-on from a great distance. The separation between them is decreasing at a rate of 782.5 km/s. The Enterprise sends a laser signal toward the Constitution. If the Constitution observes a wavelength λ = 670.3 nm, what wavelength was emitted by the Enterprise?
Questions & Answers
QUESTION:
Problem 22P
Two starships, the Enterprise and the Constitution, are approaching each other head-on from a great distance. The separation between them is decreasing at a rate of 782.5 km/s. The Enterprise sends a laser signal toward the Constitution. If the Constitution observes a wavelength λ = 670.3 nm, what wavelength was emitted by the Enterprise?
ANSWER:Step 1 of 3
As the starships are move towards each other, the laser from Enterprise will be observed by Constitution as per Doppler Effect
where
is the original frequency of light
is the frequency observed by observer
is velocity of galaxy with respect to Earth
is the speed of light