Question

1. A beam of monochromatic (same-energy) electrons of wavelength λ = 10-12[m] encounters slits of width d = 1.9×10-10[m]. This corresponds to the scattering we get in an electron microscope when the electrons pass between rows of atoms.

2. A. Find the scattering angle θ at which the first order diffraction maximum is created, e.g. by assuming for most small-angle diffraction processes that θ ≅ λ/d ≅ g/L.

​​​​​​​B. Find the separation g between the unscattered beam and this first order maximum, as seen on a fluorescent screen a camera length L = 1.1 meters away. This corresponds to the size of diffraction patterns on electron microscope film.

Answer 1