Colour and Light #2

Question 1

What do the particular wavelengths of light that a substance absorbs determine?

Answer 1

the color we perceive and depends on the energy levels of the electrons in the atoms or molecules or that make up the substance.

Question 2

What is this absorportion colouration mechanism responsible for?

Answer 2

the colors of grass, blood, carrots, etc.

Question 3

Why is this colour absorption mechanism not true for the sky?

Answer 3

The sky’s color is due to selective scattering of different wavelengths of sunlight by the molecules of nitrogen and oxygen in the atmosphere.)