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

question 16

Multiple Choice

How many times greater is the speed of infrared light ( $\lambda$ = 800 nm) than the speed of violet light ( $\lambda$ = 400 nm) in a vacuum?

• A) 2
• B) 1/2
• C) 400
• D) 1; that is, both have the same speed.

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