How Many Times Greater Is the Speed of Red Light $\lambda$

How many times greater is the speed of red light ( $\lambda$ = 700 nm) than the speed of ultraviolet light ( $\lambda$ = 380 nm) in a vacuum?

A) 1.84 , the first color of light is faster
B) 0.54 , the second color of light is faster
C) 3.00 x 10⁸ , the first color of light is faster
D) 1.00 , both colors of light have the same speed
E) 3.00 x 10⁸ , the second color of light is faster

Correct Answer:

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