How fast would you have to drive in order to see a red light as green? Assume $\lambda$ = 630 nm for red and $\lambda$ = 530 nm for green A) 5 $\times$ 10⁷ m/s B) 5 $\times$ 10⁶ m/s C) 5 $\times$ 10⁵ m/s D) 5 $\times$ 10⁴ m/s

Question

Quizplus · Accepted Answer

To see a red light (630 nm) as green (530 nm), you need to use the relativistic Doppler effect formula. The speed required is a significant fraction of the speed of light, approximately 5 * 10^7 m/s.

How Fast Would You Have to Drive in Order to See