The one parameter that determines the brightness of a light source sensed by an eye is :

energy of light entering the eye per second

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wavelength of the light

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total radiant flux entering the eye

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total luminous flux entering the eye

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Solution

The correct option is D total luminous flux entering the eye
Total luminous flux entering the eye is one of parameter that determines the brightness of light sensed by an eye. Other parameter are amount of light entering the cornea, etc.

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