Modern Physics 7 Question 35

36. A beam of electron is used in an YDSE experiment. The slit width is $d$. When the velocity of electron is increased, then

(a) no interference is observed

$(2005,2 M)$

(b) fringe width increases

(c) fringe width decreases

(d) fringe width remains same

Show Answer

Solution:

  1. As velocity ( or momentum) of electron is increased, the wavelength $\lambda=\frac{h}{p}$ will decrease. Hence, fringe width will decrease $(\omega \propto \lambda)$.


NCERT Chapter Video Solution

Dual Pane