In infrared photography, the film or image sensor used within a digital camera is sensitive to infrared lighting, which allows the camera to pick up any light that's invisible to the human eye.
There now exists a kind of glass so sensitive to light that, like photographic film, it will record pictures and designs.
现在有一种对光十分敏感的玻璃，它像胶卷一样能记录图像和图案。
3
He would have hung the shroud's fabric over a frame in a blacked - out room and coated it with a substance to make it light-sensitive, just like photographic film.