Quote:
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Originally Posted by Strzelecki
Therefore it's not due to diffraction or refraction that they are blue. Do you want the point or shall I give it to Homealone?
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exactly!! transmitted light shows brown, reflected light shows blue ie the light has been refracted
---------- Post added at 21:51 ---------- Previous post was at 21:49 ----------
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http://en.wikipedia.org/wiki/Variometer