Why are photographic plates covered with black paper?

Question

a. cellulose acetate of the paper must remain fresh

b. sunlight is easily absorbed by black paper & it helps develop the film

c. silver bromide present on the plate is very sensitive to light and black paper prevents contact with light

d. conversion of silver bromide to metallic silver is essential.

Answer 1

reasons
1) photographic plate get affected when light fall on it. it get damaged.
2) black color absorbs about 98% of light and doesn't allow to light to penetrate through it. and keep photographic plate safe.

Answer 2

c. If light were to hit the photographic plate before you used it to take a photograph, the whole plate would become fogged (partial light damage) or completely black.