Opacity

 

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All the objects we perceive reflect color; a sunny day shines a yellow light because the

other wavelengths are filtered out in the atmosphere. But noticing carefully, one sees the 

light is yellow on white or near-white surfaces - like the sidewalk - which reflect all

wavelengths.

If I layer on a partially opaque figure on another that is fully opaque, I get a paintshop

effect.

                                                               

                                           

I just checked the parking lot; a light blue car does not appear green in the 

sunlight...