1.

In a Young's double slit experiment, the slits are placed 0.320 mm apart. Light of wavelength λ = 500 nm is incident on the slits. The total number of bright fringes that are observed in the angular range -30° ≤ θ ≤ 30°is:

A. 640
B. 320
C. 321
D. 641
Answer» E.


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