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Matter Waves: de Broglie Wavelength

Q- Electrons with a speed of 2.5 *106 m/s pass through a double-slit apparatus. Interference fringes are detected with a fringe spacing of 1.6 mm.

(a) What will the fringe spacing be if the electrons are replaced by neutrons with the same speed?

(b) What speed must neutrons have to produce interference fringes with a fringe spacing of 1.6 mm?

Solution:

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