For 3 MeV photons interacting with 1 cm3 human tissue, calculate the total KERMA (in MeV/g) assuming the following: 1 photon undergoes photoelectric effect (ignore electron binding energy); 3 photons by Compton Effect (assume scattering angle is 90 degrees for all photons), and 2 photons by pair production.

caculate the energy [in ev]  of a photon with a wavelength of 450nm. One ev is equivlent to 1.6e-19 joules.

A proton or a neutron can sometimes "violate" conser- vation of energy by emitting and then reabsorbing a pi meson, which has a mass of 185 MeV/c². This is possi- ble as long as the pi meson is reabsorbed within a short enough time At consistent with the uncertainty principle, (a) Consider p → p + л. By what amount AE is energy conservation violated? (Ignore any kinetic energies.) (b) For how long a time At can the pi meson exist? (c) Assuming that the pi meson travels at very nearly the speed of light, how far from the proton can it go? (This procedure, as we discuss in Chapter 12, gives us an

Sunlight is composed of an enormous number of light particles. The 40m 2 sail surface of LightSail 2 receives about 4.0 x 1022 photons each second. What would be the total impulse (magnitude and direction) on the sail in one second? What would be the total impulse (magnitude and direction) on the sail in one day?

Please do fast ASAP fast

Calculate the following energies: the scattered gamma ray following a Compton interaction of a 140 keV gamma ray in which the scattering angle 0 is 45°.

Calculate the energy of a 511 keV photon after Compton has been scattered at an angle of 90° and another at 180°. The kinetic energy of the Compton electron is given by EC = hν - hν0. Calculate the kinetic energy of the Compton electron in each case.