Term - Reciprocity law
|Reciprocity law||SWPP and BPPA Photographic Glossary|
Thursday 27th November 2014
States that exposure = intensity x time, where intensity is equal to the amount of light and time is equal to the time that amount of light is allowed to act upon the photographic emulsion.
Information provided by: SWPP BPPA
SWPP & BPPA, 6 Bath St, Rhyl, LL18 3EB