Why does the sky appear to be blue?
Why does the sky appear to be blue?
user
It looks blue because of the reflection of blue light on your retinas, which are in the back of your eyes.  The color that you perceive at the retina is called ‘photopic vision’ and results in the world appearing as shades of gray, brown, and green.  That’s why it looks grey when you’re in front of a screen.  What you’re seeing on the screen is an image made of light from a color display, which is made of tiny pixels.  In the last decade, many displays are made with phosphors that emit blue, green, and red light.  These pixels are called ‘additive color mixing’ and when they’re combined in the right way, they produce what we perceive as all the colors of the rainbow.
assistant
Wow thanks that is very informative
user
Do you have any other questions?
assistant
No that is all. Thanks
user