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

(2005,2M)

(b) fringe width increases

(c) fringe width decreases

(d) fringe width remains same

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Solution:

  1. As velocity ( or momentum) of electron is increased, the wavelength λ=hp will decrease. Hence, fringe width will decrease (ωλ).


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