why re light is used while developing a photo?

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2007-09-22 22:17:04 · 2 answers · asked by Haider 1 in Science & Mathematics ➔ Physics

What I understood is red light is not affeceted by the black & white photographic plate. But in the colour processing no light could be used.

2007-09-22 22:42:44 · answer #1 · answered by Joymash 6 · 0⤊ 0⤋

I suppose but not sure that the film is less sensitive to red light this is often the case

2007-09-22 22:30:54 · answer #2 · answered by maussy 7 · 0⤊ 0⤋