Question
Interference was observed in interference chamber when 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 bright bands(c) Interference with dark bands(d) Interference in which width of the fringe will be slightly increased
 
 
 
 

Answer

(d) Interference in which width of the fringe will be slightly increased

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