Assuming a 100-W sodium-vapor lamp radiates its energy uniformly in all directions and the wavelength of the light is 589 nm, at what rate are photons emitted from the lamp and at what distance from the lamp will the average flux of photons be 1 photon/cm2

When can a theory be modified if a new type of technology allows for new observations that raise new questions? a-immediately, while the questions about the theory are being asked b-after new hypotheses related to the theory are tested in experiments c-only after the new observations disprove all parts of the theory d-while scientists begin to think about how the theory could improve