Your perception that the white sheet on your bed appears to be white in the morning and evening when lighting conditions are dim as well as at noontime when lighting conditions are very bright is due to the fact that:
A) the albedo of the sheet is constant throughout the day
B) the absolute amount of light energy from the sheet that falls on the retina is constant
C) the sheet reflects the same amount of light at all hours
D) we rely on the lightness constancy to determine lightness

Question

Quizplus · Accepted Answer

Our perception of the color of the white sheet is influenced by the concept of lightness constancy, which allows us to perceive an object as having a constant lightness despite changes in lighting conditions. This means that our brain adjusts our perception of the sheet's whiteness based on the surrounding lighting conditions. Therefore, the sheet could be reflecting different amounts of light throughout the day, but our brain interprets it as being the same color due to lightness constancy.

Your Perception That the White Sheet on Your Bed Appears