Definition: states that, when the light source is a point, illumination on a surface is inversely proportional to the square of the distance of the light source.
Definition: A law of physics that states that light from a point source fall off inversely to the square of the distance. As a example, if a light is 10 feet from your subject and you move it to 20 feet, you'll only have 1/4 the lighting intensity. If you move the light to 40 feet, it will now have only 1/16th the intensity.
Definition: A law of physics stating that the intensity of illumination is inversely proportional to the square of the distance between light and subject. This means that if the distance between light and subject is doubled, the light reaching the subject will be only one-quarter of the original. ISO A numerical rating that describes the sensitivity of a film to light. The ISO rating doubles as the sensitivity of the film doubles.
Definition: A law of physics that states that light from a point source fall off inversely to the square of the distance. As a example, if a light is 10 feet from your subject and you move it to 20 feet, you'll only have 1/4 the lighting intensity. If you move the light to 40 feet, it will now have only 1/16th the intensity.
Definition: A law of physics stating that the intensity of illumination is inversely proportional to the square of the distance between light and subject. This means that if the distance between light and subject is doubled, the light reaching the subject will be only one-quarter of the original. ISO A numerical rating that describes the sensitivity of a film to light. The ISO rating doubles as the sensitivity of the film doubles.
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