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A Square Has Sides of Length L

Question 8

Multiple Choice

A square has sides of length L.In the lower-right and lower-left corners there are two sources of light waves,one in each corner,that emit identical in-phase light waves of wavelength 8.28 m in all directions.What is the minimum value of L such that constructive interference occurs in the upper-right corner? Ignore any reflections.


A) 8.28 m
B) 10.0 m
C) 16.6 m
D) 20.0 m

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