How Many Times Greater Is the Speed of Red Light

question 13

Multiple Choice

How many times greater is the speed of red light (λ = 700 nm) than the speed of violet light (λ = 400 nm) in a vacuum?

• A) 1.75 , the first color of light is faster
• B) 0.57 , 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

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