(a) not a medical person so can't answer this (b) unlikely, monitors work by essentially filtering out undesired colors from white light. I don't believe that

(a) not a medical person so can't answer this (b) unlikely, monitors work by essentially filtering out undesired colors from white light. I don't believe that >650nm light is within the color gammut of monitors. That's quite a long wavelength and close to infrared. To give you an indication, the Helium Neon lasers which used to be very common in schools etc for laser demonstrations have a wavelength of 632nm. Even if the monitor could display this, the brightness would likely not be strong enough. (c) Could be, but it might be quite annoying to do.