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Q.

 In an experiment similar to Young's experiment, interference is observed using waves associated with electrons. The electrons are being produced in an electron gun. In order to increase the fringe width

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a

electron gun voltage be decreased
 

b

the screen be moved closer to interfering slits

c

the slits be moved away

d

 electron gun voltage be increased

answer is B.

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Detailed Solution

Fringe width β=λD2d
According to de Broglie, wavelength
[As V decreases λ increases i.e β increeases

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