10. a. Derive the formula 1 = hc/E for the wavelength associated with a photon of energy E. b. From this, derive Equation (2.21). c. What wavelength (in units of nm) is associated with a 10 keV photon (diagnostic imaging energy)? d. How does this wavelength compare to the size of an atom? 11. Give the SI units for the following quantities: WWoke sill da a. frequency Ofthe Bery biologic b. wavelength c. power d. energy 12. a. Write the following list of types of electromagnetic radiation in order of decreasing wavelength: radio, x-rays, visible light, ultraviolet, infrared, microwaves. b. Is the energy increasing or decreasing? 13. a. Describe briefly, in words, the nature of an electromagnetic wave. b. Compute the frequency and wavelength of a 100 kev photon. 14. a. What is the frequency, expressed in MHz, of an electromagnetic wave with a wavelength of 6.0 cm? b. What band of the electromagnetic spectrum is this in? usholla 15. a. A tungsten atom is ionized by ejection of an L shell electron. How much energy is required? ofW ed sing al b. What is the value of the quantum number ? 16. a. An electron makes a transition from the L to the K shell in tungsten. What is the energy of the emitted photon? b. What is the wavelength of the photon, and in what part of the electromagnetic spectrum does it reside