Final answer:
option 1,High-energy electrons interacting with the output phosphor produce visible light, as the excited electrons emit photons in the visible spectrum when returning to their ground state.
Step-by-step explanation:
The interaction of high-energy electrons with the output phosphor produces visible light. When these electrons collide with a phosphor material, they transfer their energy to the phosphor atoms. This energy excites the atoms, elevating electrons to higher energy states. When these excited electrons return to their ground state, they emit photons in the visible spectrum, which is the light we can see. The energy level of these photons typically corresponds to the visible light range, which is about 1.63 to 3.26 eV for photons from red to violet. This principle is used in devices like cathode ray tubes, where electron collisions result in visible light emissions that form the images on the screen.
The interaction of high-energy electrons with the output phosphor produces visible light. When the high-energy electrons strike the output phosphor in a cathode ray tube or other devices, the phosphor absorbs the energy and then emits visible light. This light is what we see on the screen or display.