Physics help :(

[phatj]

I usually dont do this but this problem has me stumped.

note
mass of electron = 9.11e-31 kg
mass of neutron = 1.674e-27 kg

Electrons with a speed of 2.1e6 m/s pass through a double-slit apparatus. Interference fringes are detected with a fringe spacing of 2.4 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 1.4 mm?

 

[PurdueRy]

I can't find any equations for neutron diffraction...just electron. But here's a bump to see if anyone else knows

 

[phatj]

i assume neutron diffractions equations apply the same (since they are all matter as opposed to photons) but there would be a mass replacement... however I cannot find a way to tie the mass of the particle to the fringe spacing

 

[RichardE]

Try HT...prolly get more answers.

 

[ElMonoDelMar]

I'm sorry.

Here's a pity bump from someone who hates E&M or quantum or whatever the hell you're in.