Dental radiography commonly uses X-rays whose wavelength is approximately 0.10nm.
(i) Calculate the frequency of these X-rays in free space.
(ii) Determine the energy of one photon of this radiation in electron-volts (eV).
(iii) A photon of ultraviolet light has wavelength 200nm. Find the ratio of the photon energy of the X-ray to that of the ultraviolet radiation. Comment on what this ratio implies about the relative penetrating powers of the two radiations.