Here Mr. Ephraim Chambers was abbreviating two words camera obscura which is Latin for “darkened room.”
You will sit alone in the balcony of the south, and I shall sing from the darkened room.
When you turned the knob to switch it on, an orange glow would gradually light up a darkened room on a winter's evening.
Fog up a piece of glass with your breath and look through the fogged plate in a darkened room at a white-light point source.
After I had spent a night in the station, alone in a darkened room, my father came to try to get me released.
When light encounters a cloud of small particles, it is diffused. For example, when sunlight enters a darkened room through a gap in the blinds, it will appear as a brilliant ray of light.
In the days before the kind of cameras we know, people would use such darkened rooms to trace an accurate sketch on the wall based on the projected image.
