10.Two slits separated by 0.5 mm are illuminated with light of wavelength 480 nm. Assume the screen is far away from the slits. What is the path difference between waves that results in the first-order bright fringe?
(A) 120 nm
(B) 240 nm
(C) 480 nm
(D) 960 nm
(E) None of the above.

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