Question

Draw a suitable diagram and explain the ‘luminosity curve’ of a normal human eye.

Answer 1

For low light levels, the response of the human eye changes, and the scotopic curve applies. The photopic curve is the CIE standard curve used in the CIE 1931 color space. The luminous flux (or visible power) in a light source is defined by the photopic luminosity function.

Answer 2

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