posted by M on .
An electron microscope employs a beam of electrons to obtain an image of an object. What energy must be imparted to each electron of the beam to obtain a wavelength of 15.2 pm? Obtain the energy in electron volts (eV) (1 eV = 1.602 10-19 J).
E = hc/wavelength
Plug in the wavelength, calculate E (in Joules) and convert to eV.