Could someone help me out with this problem please?? You have just been pulled o
ID: 1664319 • Letter: C
Question
Could someone help me out with this problem please??You have just been pulled over for running a red light, and thepolice officer informs you that the fine
will be $250. In desperation, you search for excuses and recall theDoppler effect. In your calmest
voice, you tell the officer that the laws of physics prevented youfrom knowing that the light was red. In
fact, as you drove towards it, the light was Doppler shifted towhere it appeared green to you. “OK,”
says the officer, “Then I’ll ticket you for speeding.The fine is $1 for every 1 km/hr over the posted
speed limit of 50 km/hr.” How big is your fine? Use 650 nm asthe wavelength of red light and 540 nm
as the wavelength of green light.
Explanation / Answer
That equation is the doppler equation when you consider relativyeffect = v/c and if the car is going toward the traffic light, it meanf'>f0 so it is f'=f0*sqrt((1+)/(1-))