Can infrared rays be photographed with a camera?

Yes, infrared light is infrared light, and the wavelength of light is longer than human eyes can perceive. The film she wants to talk about here is also sensitive to infrared light, only the exposure time is longer, but ultraviolet light can definitely make the film sensitive! ! Ultraviolet light is also invisible. What's more, black and white photographic paper (I have only done this) is not sensitive to infrared light or even red light before fixing, so why is the red light (so-called safety light) used in darkroom not good for film? Film should be developed and fixed in absolute darkness.