A physicist is arrested for running a red light. In court, he pleads that he approached the intersection at such a speed that the light looked green to him. The judge, having taken a couple physics courses as an undergraduate, changes the charge to speeding and fines the defendant $1 for every mile per hour over the local speed limit of 30 miles per hour. What is the fine?
Assume the wavelength of green light is 530 nm and the wavelength of red light is 650 nm, and note that the light is coming toward the driver - i.e., it has a negative velocity.