How can you have a scene linear reflectance greater than 100%?

Started 3 months ago | Questions thread
Tom Axford Veteran Member • Posts: 8,655
Fluorescence
2

White paper often has a reflectance of well above 100%, the reason being that the reflectance is defined as the ratio of the visible light reflected to the visible light incident, measured in standard daylight. Optical brighteners are used to increase the reflectance because they convert incident UV light into reflected visible light and this accounts for the increase above 100%.

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