Darkrooms for developing black-and-white film were sometimes lit by a red bulb. Why red? Explain if such a bulb would work in a darkroom for developing color film.
Solution 4Q: We have to explain the reason behind the using red bulb for developing black-and-white film and also, can we use red bulb for developing color film. Step 1 of 2 Concept: Quantum Law: Energy (E)of an electromagnetic radiation is inversely proportional to the wavelength() of the radiation. Mathematically, 1 E …(1)