Interference was observed in interference chamber where air was present, now the chamber is evacuated,
Interference was observed in interference chamber where air was present, now the chamber is evacuated, and if the same light is used, a careful observer will see
(a) no interference
(b) interference with brighter bands
(c) interference with dark bands
(d) interference with larger width
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Correct option (d) interference with larger width
Explanation:
In vacuum, λ increases very slightly compared to that in air. As β ∝ λ, therefore, width of interference fringe increases slightly.
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