Which of the following compound is/are used in black and white photography?

Correct option is C

Silver bromide (AgBr) and silver chloride (AgCl) are the primary compounds used in traditional black and white photography. These compounds are light-sensitive halides, which means they undergo chemical reactions when exposed to light. When a photographic film or paper coated with silver bromide or silver chloride is exposed to light, a small amount of silver metal is formed. This forms the latent image, which can be developed further during the photographic process to produce a visible image. Silver bromide is more commonly used than silver chloride due to its higher sensitivity to light, but both compounds are essential for creating clear and sharp black-and-white images.

Important Key Points:

1. Silver bromide (AgBr) is the most widely used compound in black-and-white photography because of its optimal sensitivity to light.
2. Silver chloride (AgCl) is also used but is more sensitive to blue light and often used for photographic papers rather than films.
3. In the developing process, the exposed silver halide is reduced to elemental silver, forming the image.
4. Silver salts like AgBr and AgCl are sensitive to light, making them ideal for capturing images on film.
5. The process of developing involves chemical treatments to enhance the image formed by light exposure.
6. Advances in digital photography have reduced the use of silver halide-based processes, but they are still used in specialized artistic and scientific applications.

Information Booster:

• Silver bromide (Option a): This compound is highly sensitive to light and is the most commonly used in photographic films.
• Silver chloride (Option b): More sensitive to light than silver bromide, but is mainly used for photographic papers due to its slow reaction.
• Silver oxide (Option d): This compound is not used in photography. It is commonly used in batteries, especially in silver oxide cells.