1.

Using the equation for the distance between fringes, Ay = calculate the distance (in cm) between fringes for 628 nm light falling on double slits d separated by 0.0650 mm, located 3.20 m from a screen as in the figure. Screen Ay = x1 d y X cmThe analysis shown in the figure below also applies to diffraction gratings with lines separated by a distance d. Screen Ay = XA d y X What is the distance (in m) between fringes produced by a diffraction grating having 100 lines per centimeter for 620 nm light, if the screen is 1.50 m away? m