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A man in a spaceship moving with a speed of 0.6c away from a space platform shines a light
of wavelength 500 nm toward the platform. What is the frequency (in Hz) of the light as seen
by an observer on the platform?
a) 3.9x1014 b) 1.2x10¹5 e) 2x1014
d) 1.8x1015 e) 3x1014
f) 9.2x1014
a
b
C
d
e
f

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