In technical terms, an inverse-square law is defined as “any physical law stating that some physical quantity or strength is inversely proportional to the square of the distance from the source of that physical quantity.” With a definition like that, you’re probably wondering what on earth this could possibly have to do with photography (and no one could blame you). Inverse-square laws apply to many, many things in the world. Today however, we’re only going to be looking at one of them: light.
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