A beam of electron is used in Young's double slits experiment. The slit width is d. When velocity of electron is increased, then :
Answer & explanation
Correct answer: option 3
$ \lambda = \frac{h}{mv}$
$\text{ As velocity is increased wavelength will decrease.}$
$\text{Fringe Width }\beta = \frac{\lambda D}{d}$
$\text{As wavelength decreases fringe width will also decrease.}$