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Unformatted text preview: Penumbra = secondary shadow Only park of the sun is blocked (so at Y a partial eclipse is observed). When the umbra doesnt reach the Earth, the Moon doesnt completely hide the Sun. At A, you see bulls eye effect. This is called an Annular eclipse (a kind of solar eclipse). Solar corona (outer atmosphere of the sun) is visible during totality. Refraction by Earths atmosphere allows us to see Moon in umbra Refraction when light bends as it encounters and move through a different medium. Dust scatters blue light creating reddish appearance of eclipsed moon....
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This document was uploaded on 01/26/2011.
- Spring '10