A particle of mass 3.19 x 10 2 kg has a potential energy of 7.12 x 10-13 J, independently of its position. If its energy is 11.0 x 10-15 J, what is its angular wave number? Number Units VA particle of mass 3.19 x 102/ kg has a potential energy of 7.12 x 101> J independently of its position. If its energy is 11.0 x 101 J what is its angular wave number? Number n Units v You will find in Chapter 39 that electrons cannot move in definite orbits within atoms, like the planets in our solar system. To see why, let us try to "observe" such an orbiting electron by using a light microscope to measure the electron's presumed orbital position with a precision of, say, 5 pm (a typical atom has a radius of about 100 pm). The wavelength of the light used in the microscope must then be about 5 pm. (a) What would be the photon energy of this light? Number n Units v (b) How much energy would such a photon impart to an electron in a head-on collision? Number [E Uni't e