i) When a photon and an electron each encompass the similar energy of 20.0 eV, determine the wavelength of each.
ii) When a photon and an electron each encompass the similar wavelength of 250 nm, determine the energy of each.
iii) You wish for to study an organic molecule which is around 250 nm long using either a photon or an electron microscope. Around what wavelength must you use and which probe, the electron or the photon, is probable to damage the molecule least?