Question

photographic films and plates have an essential ingredient is.

Answer 1

The most important ingredient is silver halide(silver iodide or silver chloride)

Answer 2

Answer:

The essential ingredient in photographic plate and films is silver bromide.

Explanation:

The photographic plate of a film includes a glass plate or a thin layer of celluloid coated with a thin layer of emulsion of a silver bromide which is dispresed in gelatin. Moreover silver bromide or AgBr is more photosensitive so it is used as an essential component.