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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 |
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a) |
No interference |
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b) |
Interference with bright bands |
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c) |
Interference with dark bands |
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d) |
Interference in which width of the fringe will be slightly increased |
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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 |
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a) |
No interference |
|
b) |
Interference with bright bands |
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c) |
Interference with dark bands |
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d) |
Interference in which width of the fringe will be slightly increased |
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(d) The refractive index of air is slightly more than 1. When chamber is evacuated, refractive index decreases and hence the wavelength increases and fringe width also increases |