Compounds of which of the following metals is used in black and white photography?
Correct Answer:
B. Ag
Explanation:
Silver bromide (AgBr) and other silver halides are used in black and white photography due to their extreme sensitivity to light. These compounds are coated onto photographic film or paper in a gelatin emulsion. When light enters the camera and strikes the surface, it triggers a photochemical reaction that decomposes the silver halide into metallic silver and halogen atoms. This process forms a latent (invisible) image where the amount of silver produced is proportional to the light intensity. During development, a chemical solution amplifies this latent image by reducing the remaining exposed silver halide grains into black metallic silver, creating the visible negative. Finally, a fixer solution removes any unexposed silver halides to stabilize the image and prevent it from further darkening when exposed to light.
Click below to open Discussion & Feedback
0 Issues
Please
login to comment or Report Issues.