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For example, if the ceiling height is 8 feet, then the distance between cans should be 6 feet to 7 feet, 6 inches apart. According to the Lighting Research Center, the recessed lighting unitâs design, distance from the wall and spacing will affect the lightingâs effect on the room.
If the distance between slits is d, and the angle to a bright fringe of a particular color is Î¸, the wavelength of the light can be calculated. Problem: The first order bright line appears 0.25 cm from the center bright line when a double slit grating is used. The distance between the slits is 0.5 mm and the screen is 2.7 m from the grating. Find the wavelength. Problem: A diffraction grating has 420 lines per mm. The grating is used to observe normally incident light with a wavelength of 440 nm.