Problem 1: What's green and yellow, but most often red? (15 pts) Imagine you are standing in front of a trafc light waiting for the red light to turn green. Inspired by PHYS 181 you decide to take this as an opportunity to think about the role of physics in this everyday experience. A fun thing to gure out would be the frequency of radiation for the red light. In order to do this you would rst have to search for the wavelength (in mm) the red light emits and compute its frequency of radiation. (a) Find out what wavelength the red light emits and calculate the frequency of radiation for this wavelength. If you don't remember the exact value of the red color wavelength, you are welcome to google it. (5 pts) (b) Similarly, if the frequency of radiation for the green trafc light is 5.45 x 1014 3'1, what wavelength would that value correspond to? (5 pts) (c) What is the energy (E = hv, where h is Planck's constant) of one photon of red light? Compare this to the energy of one photon of green light. (5 pts)