Ask Dr. Science
February 14, 2005:
Nivek asks: Dear Dr. Science, Why is the sky blue.
Dr. Science responds:
Excellent question my friend. You see, as the Sun's light enters Terra Firma's atmosphere it is scattered by gases. Now the light from Sun contains both BLUE and RED light. On a clear day, the blue light is scattered more than the red, and at sunset the red more than the blue.
But Dr. Science you say, there are other colors in sunlight than blue and red! Well yes, sunlight does contain all colors of the rainbow. However, the human eye is most receptive to red, green, and blue wavelengths.
Keep those questions coming!