Why is the Sky Blue? 

Particles in the atmosphere tend to scatter visible light of the shortest wavelengths first, of which blue is perceived with particular clarity by one of our three color receptors. When the sun beams directly down at us, that means that there is one strong beam of whitish-yellow direct light (if you stare straight at the sun — but don’t…), and ambient blue light coming from all other directions.
During a sunset, sunlight must pass through a lot more atmosphere. The blue light is scattered first, and the longer wavelengths are scattered later, when they are more likely to be contacting the air from which the ambient light is refracting that you are perceiving.
Still confused? No? Ok. Great. My work is done. ;P
Advertisements

Published by

pdaines

Peter Daines is a law student at Georgetown University Law Center. His interests include studying foreign languages, watching and predicting events in politics and the music industry, and searching fruitlessly for the meaning of life.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s