A Pair of Narrow Slits That Are 1

question 97

Multiple Choice

A pair of narrow slits that are 1.8 mm apart is illuminated by a monochromatic coherent light source.A fringe pattern is observed on a screen 4.8 m from the slits.If there are 5.0 bright fringes/cm on the screen,what is the wavelength of the monochromatic light?

• A)550 nm
• B)600 nm
• C)650 nm
• D)700 nm
• E)750 nm

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