Open Question: Why does planet earth's sky appear to be the color blue?
When you look at the sun, it's yellowish because you are looking at it head on.
When you look at the sky, you are looking at indirect light. That is light that is coming in perpendicular to your sight and then it scatters in the perpendicular direction (towards your eye).
Longer wavelengths scatter more forward (i.e. when you look directly at the sun) and shorter wavelengths scatter more in the perpendicular direction (i.e. when you look away from the sun at the sky).
Therefore more blue light scatters in the perpendicular direction and more red light scatters in the forward direction.
You can read this wiki article for more details:
http://en.wikipedia.org/wiki/Rayleigh_scattering
Edit:
Conversely, this also explains the red when the sun is setting/rising. When you see the sun setting, the sun's light has to go through A LOT of the atmosphere, since you're seeing mostly the forward scattering you see more red/orange (longer wavelengths).
Open Question: Do the frog red blood cells appear red on a slide? Why?
Open Question: when viewed in red light an object that reflects all the colors of light will appear_______.?
Open Question: Which countries and empires shown on the prewar map do not appear on the postwar map?
Open Question: Find the time that this projectile would appear to have the maximum distance above ground.?
Pera K Member since:March 27, 2011Total points:83 (Level 1)A science project studying catapults sent a projectile into the air with an initial velocity of 24.5 m/s. The formula for distance (s) in meters with respect to time in seconds is s = -4.9t2 + 24.5t.
Find the time that this projectile would appear to have the maximum distance above ground.Answer QuestionBe the first to answer this question.
