What is red opposite to on the spectrum?
violet
What is it next to?
orange
what is the light's wavelength range?
roughly 620–740 nanometres
What does RGB stand for?
Red Green Blue
What about RYB?
Red, Yellow, Blue
What does the red in blod come from?
hemoglobin
What about in geological areas?
hematite or red ochre
What causes the red sky at sunset?
Rayleigh scattering
Is it the same with sunrise?
yes
What are the pigments affecting the leaves called?
anthocyanins
Is it true that when the sun is low or below the horizon, the red-wavelength decreases the light that reaches the eye?
no
What percentage of humans are redheaded?
two