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Science John Tyndall. Subscribe Now. Subscribe now. Hence the Sun and skies look redder at dawn and dusk. The low density of air molecules means that the Rayleigh scattering that causes our skies to be blue on Earth has a very small effect on Mars. We might expect it to have a very faint blue coloured sky, but due to the haze of dust that remains suspended in the air the daytime sky on Mars appears more yellow.
This is because the larger dust particles absorb the short wavelength blue light, and scatter the remaining colours to give a butterscotch hue over the Martian sky. When the air is too thin for gas molecules to collide with each other, we call it an 'exosphere' instead. But what makes the sea blue — is it reflecting the blue of the sky?
Water molecules are good at absorbing longer wavelengths of light, so when sunlight hits the water the reds and oranges get absorbed.
The shorter wavelength blue light is absorbed very little and much of it is reflected back to our eyes. This article has been written by an astronomer at the Royal Observatory, Greenwich. For example, Mars has a very thin atmosphere made mostly of carbon dioxide and filled with fine dust particles. During the daytime, the Martian sky takes on an orange or reddish color. But as the Sun sets, the sky around the Sun begins to take on a blue-gray tone.
The top image shows the orange-colored Martian sky during the daytime and the bottom image shows the blue-tinted sky at sunset. Our World: Sunsets and Atmospheres.
Why Is the Sky Blue? The Short Answer:. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. Explore some more! Spring is finally here, bringing along with it plenty of flowers, warmer weather and blue skies. Lord Rayleigh was a British physicist in the 19 th century. He discovered the element Argon, wrote books on sound that are still used today and played an important role in the start of quantum mechanics.
His name is also given to Rayleigh Scattering, which is the scattering of light particles into individual colors based on size. This effect can be seen when you look up at the sky and see that beautiful Carolina Blue covering horizon to horizon. Any fan on Pink Floyd knows that when white light enters a prism, a rainbow of color comes out the other side.
Together, the colors make white light, but they have their own individual wavelengths. The prism changes the speed of each wavelength, making some colors slightly change direction, spreading them out into the rainbow they are.
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