<p>I really need help on these physics questions as I do not understand them at all.</p>
<li><p>If the sky were normally orange on a certain planet what color would its sunsets be?
I was thinking blue because it seems like it would just be the opposite of the earth but I had no idea how to explain it or even if it was right.</p></li>
<li><p>Light emerges from a piece of glass at the same speed at which it entered. The light however, slowed down while passing through the piece of glass. How is it possible that its speed upon emerging is the same as its initial speed?
This one makes sense but how do you go about writting a nice explanation for it?</p></li>
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<p>Thanks for the help guys.</p>
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<li><p>No clue</p></li>
<li><p>Because the speed of light is supposedly a constant. So through the same air content, the light should travel at the same speed even if it has passed through glass (not quite sure if that helped or not)</p></li>
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<p>The sky is normally blue for us, and the colors of our sunsets have a longer wavelength: yellow/orange/red.</p>
<p>If the sky is normally orange for the planet, the only color with a longer wavelength is red. So I would guess red.</p>
<p>But that's a complete guess. It's coming from the ideas that particles in the air reflect the colors with shorter wavelengths first. During the day, only purple is reflected away. However, during the sunrise/sunset, when there is a longer distance between us and the sun, the particles can reflect away purple, blue, and green. That's what I remember from 6th grade earth science.</p>