Photographic films or plates have ......... as an essential ingredient. — d and f Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Photographic films and plates rely on light-sensitive compounds (halides) to capture latent images upon exposure. Step 2: Silver bromide (AgBr) is highly sensitive to light and undergoes photolysis to form metallic silver and bromine. Step 3: Thus, silver bromide is the essential ingredient in photographic emulsions, corresponding to option (b).