Scotopic vision corresponds to roughly which luminance range?

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Multiple Choice

Scotopic vision corresponds to roughly which luminance range?

Explanation:
Scotopic vision is rod-dominated and comes into play in extremely dim light, when cones are essentially inactive and the eye relies on rods for sensitivity. In practical terms, this corresponds to a very low luminance level, around 10^-5 to 10^-3 cd/m^2. At these levels, you can detect shapes and movement, but color vision is minimal and detail is limited because the rod system is optimized for sensitivity rather than color or sharp acuity. The other ranges are much brighter—daylight or near-sunset levels—where photopic (cone-based) vision or mixed (mesopic) vision would dominate. So the extremely dim luminance range of 10^-5 to 10^-3 cd/m^2 best matches scotopic vision.

Scotopic vision is rod-dominated and comes into play in extremely dim light, when cones are essentially inactive and the eye relies on rods for sensitivity. In practical terms, this corresponds to a very low luminance level, around 10^-5 to 10^-3 cd/m^2. At these levels, you can detect shapes and movement, but color vision is minimal and detail is limited because the rod system is optimized for sensitivity rather than color or sharp acuity. The other ranges are much brighter—daylight or near-sunset levels—where photopic (cone-based) vision or mixed (mesopic) vision would dominate. So the extremely dim luminance range of 10^-5 to 10^-3 cd/m^2 best matches scotopic vision.

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