7. In 1801 Thomas Young demonstrated his double slit experiment using monochromatic lightfrom a single slit which then passed through a double slit. A pattern of dark and light bandswas seen on the screen as shown in the diagram.not to scalelightsourcenarrowsingleslitdoubleslitscreenwavelength, A=dark band(a) In double slit experiments, the equation to find the wavelength of monochromatic lightused is given by,wsDlight bandAdd labels showing the distances D, w and s.(b) Explain how the pattern on the screen is formed with light and dark bands.(c) For one experiment the distance between the double slit and the screen was 0.80 m andthe distance between the double slits was 1.3 mm.i. Calculate the wavelength of the light used if the distance across 20 bright bands is8.8 mm.ii. Calculate the new fringe width if the monochromatic light is changed to one ofwavelength 480 nm but nothing else is changed about the arrangement.

The equation used to find the wavelength of monochromatic light in a double-slit experiment is:

Answered: (a) In double slit experiments, the…

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