what do you understand by terms film size and speed ?
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Answer:
Film speed. ... Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system. A closely related ISO system is used to describe the relationship between exposure and output image lightness in digital cameras.
film speed
film speedThe sensitivity of a photographic medium (e.g., a radiograph) to light or radiation. The film speed is determined by: the size of its silver halide crystals; the thickness of the emulsion; and the presence of radiosensitive dyes. Films are described as “fast” if the film requires little radiation to produce an image and “slow” if more radiation is needed.
terms film size
35mm film has a standardized frame size of 24mm x 36mm (864 sq. mm of film surface). An advantage of 35mm is because it's smaller.
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