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10. A plane wave with a wavelength of 500 nm is incident normally on a single slit with a width of 5.0 x 10-6 m Consider waves that reach a point on a far-away screen such that rays from the slit make an angle of 1.0° with the normal. The difference in phase for waves from the top and bottom of the slit is: A. 0 B. 0.55 rad C. 2.2 rad D. 1.6 rad E. 1.1 rad

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Answer #1

The path difference for waves from the top and bottom of the slit is, The difference in phase for waves from the top and bottom of the slit is, 2(3.14)1d sin 6) 2(3.14)(5x10-5 mld sin 1° 500x10-9 m 1.096 rad -1.1 rad Therefore, option (E) is correct.

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