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Q.

Interference was observed in interference chamber when air was present. Now, the chamber is evacuated and the same light is used. A careful observer will see:

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a

No interference

b

Interference with dark bands

c

Interference with bright bands

d

Interference in which width of the fringe will be slightly increased

answer is D.

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Detailed Solution

If λv be the wavelength of light in vaccum and that in air be λa,then where μa is R.I of air.In air
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