In Young double slit experiment, an electron beam is used to obtain interference pattern. The slit width is d. if the speed of electron is increased, then

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no interference pattern is observed

fringe width increases

fringe width decreases

fringe width remains same

answer is C.

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Detailed Solution

we know that λ=hmvwhen v is increased, then λ is decreased further, β=λDdAs λ is decreased ,the fringe width is also decreased'

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