Function of sodium thiosulphate (hypo) in development of photographic film/plate is to______________?
Correct answer: A. Remove unexposed silver halide
- A. Remove unexposed silver halide
- B. Remove metallic silver
- C. Convert silver chloride to silver
- D. Brighten the faint images
Explanation
Sodium thiosulphate fixes photographic film by dissolving the unexposed silver halide, while the developed image remains as metallic silver. It therefore does not convert silver chloride into silver or remove the metallic image.
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