A photon with a wavelength of 2.300 x 10-11 m collides with a stationary electron. If the scattered photon has a frequency of 1.154 x 1019 Hz, what is the resulting speed of the electron? (4.68 x 10 m/s) 25. An x-ray collides with a stationary electron. What is the change in the wavelength of an x-ray if it is scattered through an angle of 120? (3.64 x 10-12 m)