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Two Coherent Sources of Monochromatic Light Are Located at S1

Question 90

Multiple Choice

Two coherent sources of monochromatic light are located at S<sub>1</sub> and S<sub>2</sub> as shown. If the sources are in phase, the intensity at point P is a maximum when A) d = l. B) r<sub>2 </sub>+ r<sub>1</sub> = l. C) r<sub>2</sub> - r<sub>1</sub> = l. D) r<sub>2</sub> + r<sub>1 </sub>= l/2. E) r<sub>2</sub> - r<sub>1</sub> = l/2. Two coherent sources of monochromatic light are located at S1 and S2 as shown. If the sources are in phase, the intensity at point P is a maximum when


A) d = l.
B) r2 + r1 = l.
C) r2 - r1 = l.
D) r2 + r1 = l/2.
E) r2 - r1 = l/2.

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