Similar to perceived loudness in hearing, the brightness the human eye and brain perceive for light is

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Similar to perceived loudness in hearing, the brightness the human eye and brain perceive for light is logarithmic rather than linear. For example, you do not perceive light that has an intensity of \(S\) as being twice as bright as light of intensity \(S / 2\). What happens to the perceived brightness of a light bulb if you double the distance from it?

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