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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. | |