(a) How fast would a motorist have to be traveling for a yellow ( 590 nm) traffic light to appear green ( 550 nm) because of the Doppler shift (b) Should the motorist be traveling toward or away from the traffic light to see this effect Explain ...

Picture the Problem As a motorist approaches a yellow signal ligh ...

(a) How fast would a motorist have to be traveling for a yellow ( = 590 nm)...

Question:

(a) How fast would a motorist have to be traveling for a yellow (λ = 590 nm) traffic light to appear green (λ = 550 nm) because of the Doppler shift?
(b) Should the motorist be traveling toward or away from the traffic light to see this effect? Explain.