An X-ray generator produces photons with energy 49 600 eV or less. Which * 1 point one of the following phrases most accurately describes the wavelength of these photons? O 0.025 nm or longer 0 0.050 nm or longer 0 0.75 nm or longer 0 0.75 nm or shorter O 0.25 nm or shorter What is an inertial reference frame? * 1 point 0 a twodimensional representation that represents an event according to the special theory of relativity O a frame of motion that contains a large quantity of material 0 any frame that serves as a reference to measure the motion of objects O a frame in which Newton's first law of motion is valid 0 a frame that is rotating with a constant rotational speed On what does the energy of a photon depend? * 1 point 0 the frequency of the photon O the mass of the photon O the size of the photon O the speed of the photon