A Double Slit That Is Illuminated with Coherent Light of Wavelength

question 84

Multiple Choice

A double slit that is illuminated with coherent light of wavelength 644 nm produces a pattern of bright and dark fringes on a screen 6.00 cm from the slits.If the slits are 2783 nm apart,what is the distance on the screen between the 4^th and the 2^nd bright fringes on one side of the central maximum?

• A)23.0 cm
• B)17.6 cm
• C)11.5 cm
• D)3.13 cm
• E)14.7 cm

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