Interference was observed in interference chamber when air is present. Now the chamber is evacuated and if the same light is used, then for the same arrangement:

No interference pattern will be obtained

Exactly same interference pattern will be obtained with better contract

The fringe width is slightly decreased

The fringe width is slightly increased

Interference was observed in interference chamber when air is presen

1.	Interference was observed in interference chamber when air is present. Now the chamber is evacuated and if the same light is used, then for the same arrangement:
A.	No interference pattern will be obtained
B.	Exactly same interference pattern will be obtained with better contract
C.	The fringe width is slightly decreased
D.	The fringe width is slightly increased
Answer» E.

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&nbsp;Interference was observed in interference chamber when air is present. Now the chamber is evacuated and if the same light is used, then for the same arrangement:

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Interference was observed in interference chamber when air is present. Now the chamber is evacuated and if the same light is used, then for the same arrangement: