Question

Before ccds were invented, what was the device most commonly used for imaging with optical telescopes? photographic glass plates polaroid cameras high-speed film video cameras

Answer 1

Before CCDs, photographic film or glass plates were commonly used for imaging with optical telescopes.

Step-by-step explanation:

Before CCDs were invented, the device most commonly used for imaging with optical telescopes was photographic film or glass plates. These plates had a light-sensitive chemical coating that recorded the image when developed. Many observatories around the world have vast collections of photographs that preserve the appearance of the sky over the past century.

Answer 2

Polaroid cameras were used