A set of parallel slits for optical interference can be made by holding two razo

Question

A set of parallel slits for optical interference can be made by holding two razor blades together (carefully) and scratching a pair of lines on a glass microscope slide that has been painted black. When monochromatic light strikes these slits at normal incidence, an interference pattern is formed on a distant screen. The thickness of each razor blade used to make the slits is .230 mm and the screen is 2.60 m from the slits. If the center to center separation of the fringes is 7.20 mm, what is the wavelength of the light

Explanation / Answer

Y = mR/d

= Yd/mR

= 7.2*10^-3*0.230*10^-3/2.6

= 636nm

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