# Homework Help: Doublie slit w/ electron problem

1. Dec 21, 2011

### overside

1. The problem statement, all variables and given/known data

In a Young’s double-sit experiment performed with electrons, the two slits are
separated by a distance of 2.0 x 10^-6m. The first-order bright fringes are located
on the observation screen at an angle of 1.6 x 10^-4 degrees. Find the wavelength
and momentum of the electrons.

2. Relevant equations

lamda = dsinx/n ?

3. The attempt at a solution

So i think electrons display the same properties as light when fired through the doublie slit thingy, thus I just subed 2E-6m for d and 1.6E-4 degree for x and used

lamda = dsinx

Answers not right though...and I really don't know where to continue from here.

2. Dec 22, 2011

### overside

come on someone help me please D:

3. Dec 22, 2011

### ehild

What results did you get?

ehild

Last edited: Dec 22, 2011
4. Dec 22, 2011

### overside

OK nevermind, what I did was right, the teacher made type and give wrong angle, thank you anywayz

5. Dec 22, 2011

### Redbelly98

Staff Emeritus