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The ERMonzis an Earth-Moon spaceship shuttle, which is equipped with identical headlight and taillight. When approaching...

The ERMonzis an Earth-Moon spaceship shuttle, which is equipped with identical headlight and taillight. When approaching Earth,at speed ?",the front light has wavelength ?front=500nm as measured by an observer on Earth. However, when the shuttle leavesEarth at the same speed, the rear light has ?'+,'=600nm with respect to the Earth observer. The spaceship’s speed relative to that of light ?=Vo/? is equal to

(A)β=1/5 (B)β=1/5 (C)β=1/9 (D)β=1/11 (E)Noneoftheabove

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