Monochromatic light from two slits forms an interference pattern on a screen. At a certain point on the screen, the intensity of the interference pattern is 57.0% of the maximum. (a) What is the minimum phase difference (in radians) between the light from the slits that produces this result? 135 How is path difference related to phase difference? In other words, for a full wavelength path difference, what is the corresponding phase difference? Knowing this, consider the formula for the intensity in the double-slit experiment. How is the argument of the cosine function related to the phase difference? Be sure your calculator is in radian mode. rad (b) If the wavelength of the light is 486.9 nm, what is the path difference (in nm) that corresponds to this phase difference? 182 How is path difference related to phase difference? Knowing the phase difference found in part (a), can you find the path difference? nm

Monochromatic light from two slits forms an interference pattern on a screen. At a certain point on the screen, the intensity of the interference pattern is 57.0% of the maximum. (a) What is the minimum phase difference (in radians) between the light from the slits that produces this result? 135 How is path difference related to phase difference? In other words, for a full wavelength path difference, what is the corresponding phase difference? Knowing this, consider the formula for the intensity in the double-slit experiment. How is the argument of the cosine function related to the phase difference? Be sure your calculator is in radian mode. rad (b) If the wavelength of the light is 486.9 nm, what is the path difference (in nm) that corresponds to this phase difference? 182 How is path difference related to phase difference? Knowing the phase difference found in part (a), can you find the path difference? nm