Electrons Emerge from an Electron Gun with a Speed of 2.0

question 46

Multiple Choice

Electrons emerge from an electron gun with a speed of 2.0 × 10⁶ m/s.They are made to pass through a double-slit apparatus.Interference fringes with spacing of 2.7 mm are detected on a screen far from the double slit.What would the fringe spacing be if the electrons were replaced by neutrons with the same speed?

• A)1.5 μm
• B)4.9 m
• C)0.93 nm
• D)1.2 km