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AP® Physics 1 & 2

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Difficult

Lambda for 2-Slit Experiment

APPH12-JWVKYL

Two slits are located a distance R apart from each other, and light shines through the slits to form an interference pattern on a screen.

If the first dark fringe in the interference pattern is observed at an angle X from the center of the pattern, what must be the wavelength of light used?

A

(RsinX) / 2

B

RsinX

C

R / (2sinX)

D

2RsinX