Question

why is red light used in photographic dark rooms​

Answer 1

Photographic paper reacts to light to produce the image taken by a camera and stored on film. Darkrooms used red lighting to allow photographers to control light carefully, so that light-sensitive photographic paper would not become overexposed and ruin the pictures during the developing process.

Answer 2

Answer:

Photographic paper reacts to light to produce the image taken by a camera and stored on film.

Explanation:

Darkrooms used red lighting to allow photographers to control light carefully so that light-sensitive photographic paper would not become overexposed and ruin the pictures during the developing process.