what determines the brightness of an object?

If you have a light on a dimmer switch and you turn it down, the room becomes darker.

Photons are still being emitted by the light, so what causes the darkness? Is it a lack of photons, or the amplitude of the light wave, or something like that that determines the brightness and illumination of the light emitting object's surroundings?

Anonymous2012-09-25T15:57:16Z

Favorite Answer

Isnt it the luminosity of an object?

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