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A Star Is Moving Toward Earth with a Speed of 0.9

Question 32

Multiple Choice

A star is moving toward Earth with a speed of 0.9 c (90% the speed of light) .It emits light,which moves away from the star at the speed of light.Relative to us on Earth,the speed of the light moving toward us (emitted by the star) is


A) c.
B) 1.9 c.
C) 1.2 c.
D) 0.98 c.

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