It Is Desired to Obtain a Diffraction Pattern for Electrons

Multiple Choice

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?

A) 10^-⁶ eV
B) 10^-⁴ eV
C) 10^-² eV
D) 10² eV
E) 10⁴ eV