It is desired to obtain a diffraction pattern for electrons using a diffraction grating with lines separated by 10 nm. The mass of an electron is 9.11 × 10^-³¹ kg.
-Suppose it is desired to observe diffraction effects for a beam of electromagnetic radiation using the same grating. Roughly, what is the required energy of the individual photons in the beam?

Question

Quizplus · Accepted Answer

To observe diffraction, the wavelength of the photons should be comparable to the grating spacing (10 nm). Using the relation E = hc/λ, where h is Planck's constant and c is the speed of light, the energy is approximately 10^2 eV for a wavelength of 10 nm.

It Is Desired to Obtain a Diffraction Pattern for Electrons