Showing posts with label Sun. Show all posts
Showing posts with label Sun. Show all posts
Mar 18, 2016
Spring Sunshine
The Sun's light reaches the surface of Earth about 8 minutes after it left the surface of the Sun. It takes 3 minutes to reach Mercury and about 4 hours to reach Neptune.
Jul 10, 2015
We Have Infinite Power
Light travels 93
million miles from the sun unobstructed and we can block it
the last few feet from reaching earth.
Mar 20, 2015
Air Traffic Control Towers
Air traffic control towers always have windows that slope toward the tower at the base. Many people assume they are designed that way to prevent the sun's reflection or glare from blinding incoming pilots.
The benefit is not for those outside the tower, but those inside it. Ordinarily, we see reflections in glass all the time, for example from computer monitors or car windows, but air traffic controllers must not have any distracting reflections as they monitor flights. By tilting the glass away, any light from inside the tower (such as video screens, lights, etc.) are reflected up onto the ceiling, which is painted black. That way, the glow from a wristwatch across the room won't be mistaken for an incoming UFO.
The benefit is not for those outside the tower, but those inside it. Ordinarily, we see reflections in glass all the time, for example from computer monitors or car windows, but air traffic controllers must not have any distracting reflections as they monitor flights. By tilting the glass away, any light from inside the tower (such as video screens, lights, etc.) are reflected up onto the ceiling, which is painted black. That way, the glow from a wristwatch across the room won't be mistaken for an incoming UFO.
Dec 23, 2011
What's in a Name, Crepuscular Rays
These are the rays of sunlight coming from a certain point in the sky. Also known as “God's rays.” I just call them awesome.
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