First slide

Young's double slit Experiment

Question

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

Easy

A

no interference pattern is observed
B

fringe width increases
C

fringe width decreases
D

fringe width remains same

Solution

we know that $λ = (\frac{h}{mv})$
when v is increased, then $λ$ is decreased
further, $β = \frac{λD}{d}$
As $λ$ is decreased ,the fringe width is also decreased'

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