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Wave Optics

  1. 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
    1. no interference​ ​
    2. interference with brighter bands ​
    3. ​interference with dark bands​
    4. ​interference fringe with larger width
Correct Option: D

In vaccum, λ increases very slightly compared to that in air. As β ∝ λ, therefore, width of interference fringe increases slightly.



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