Suppose you want to make an interferometer with two slits to show the wave nature of light to your friends. The most convenient bright light is the Sun, so you find a long cardboard box that you can take outside. The box will make a dark space in which you can make the beams through the slits combine into a pattern, and have it visible to someone looking into the box. There is a video of it this on the class site this week. Let the slits be 1 mm apart, and the box 1.5 meters long from the end where the slits are to the bottom where a white piece of paper will show the pattern.
a. Is the center of the pattern bright or dark?
b. How far is it in mm from the center of the pattern to the tenth bright fringe on either side with green light of wavelength 550 nm?
c. The fringes will show color. What is the ordering of the color from the center out, i. e. red green blue, blue green red, or something else?
d. If you did not know anything about the wavelength of light, how would you use the double slit to find the wavelength of red light?
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Suppose you want to make an interferometer with two slits to show the wave nature of light to your f...
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