Consider a source of light with wavelength lambda = 530 nm that shines on two identical narrow slits. The slits are separated by a distance a = 30 mu m. An interference pattern is observed on a screen located a distance L away from the slits. On the screen, the location of the second dark spot to the left of the central bright spot is found to be y = 1.2 cm from the central bright spot. Let this particular position on the screen be referred to as P_1. Light from both slits travels to the point P_1. How much further does the light from one slit travel compared to the light from the other slit? distance = 795 nm The path difference in part A is equal to a middot sin theta where the angle theta is the separation between the central bright spot and the second dark spot. What is this angle theta? theta = ___ degree Using the angle theta and the location y of the second dark spot on the screen, determine the distance L between the slits and the screen L = m