You shine a beam of light with frequency 1/(450 [nm]) on a mirror that is moving with constant speed with respect to you. The mirror then reflected the light beam with frequency 1/(600 [nm]) to you. What is the velocity of the mirror? Note that the answer is NOT 0.28c, -0.28c, 0.143c, -0.143c, 8.4x107m/s, -8.4x107m/s, 4.3x107m/s, nor -4.3x107m/s. Wrong answers will be disliked.

You shine a beam of light with frequency 1/(450 [nm]) on a mirror that is moving with constant speed with respect to you. The mirror then reflected the light beam with frequency 1/(600 [nm]) to you. What is the velocity of the mirror? Note that the answer is NOT 0.28c, -0.28c, 0.143c, -0.143c, 8.4x107m/s, -8.4x107m/s, 4.3x107m/s, nor -4.3x107m/s. Wrong answers will be disliked.

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