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Electrons with a speed of 2.8×106 m/sm/s pass through a double-slit apparatus. Interference fringes are detected...

Electrons with a speed of 2.8×106 m/sm/s pass through a double-slit apparatus. Interference fringes are detected with a fringe spacing of 2.5 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 2.5 mm ?

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