Multiple choice

The metal that is present in photo films is ____.

  1. mercury

  2. platinum

  3. magnesium

  4. silver

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Silver halides (specifically silver bromide and silver chloride) are light-sensitive compounds used in photographic films. When exposed to light, they undergo reduction to form metallic silver, creating the latent image that is later developed.