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1. |
What will be the angular separation of the first order fringe from the central maximum, when a light of wavelength 500 nm is diffracted at a slit of width 0.5 mm? |
A. | 2.1 minute |
B. | 3.4 minute |
C. | 4.8 minute |
D. | 5.6 minute |
Answer» C. 4.8 minute | |