If 0025 EV Neutrons Were Fired Through a Double Slit So

Multiple Choice

If 0.025 eV neutrons were fired through a double slit so that the first order interference occurred at 10°, what is the slit spacing?

A) 2.5 × 10^-8 m
B) 1.0 × 10^-9 m
C) 3.1 × 10^-11 m
D) 1.8 × 10^-10 m
E) No answer is correct since neutrons cannot act like waves.