1. Monochromatic light falling on two slits 0.0042 mm apart produces the fifth order fringe at a 7.8" angle. What is the wavelength of the light used? ( /1) 2. The third order fringe of 650 nm light is observed at an angle of 15" when the light falls on two narrow slits. How far apart are the slits? (/) 3. Monochromatic light falls on two very narrow slits 0.040 mm apart. Successive fringes on a screen 5.00 m away are 5.5 cm apart near the center of the pattern. What is the wavelength and frequency of the light? (/2) 4. A parallel beam of light from a laser with a wavelength of 656 nm, falls on two very narrow slits 0.050 mm apart. How far apart are the fringes in the center of the pattern if the screen is 2.6 m away? (/1) 5. Light of wavelength 680 am falls on two slits and produces an interference pattern in which the fourth order fringe is 48 mm from the central fringe on a screen 1.5 m away. What is the separation of the two slits? (/1) 6. If 480 nm and 620 nm light pass through two slits 0.54 mm apart, how far apart are the second order fringes for these two wavelengths on a screen 1.6 m away? (/3)