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Monday, September 1, 2008

English - Copywork & Dictation : Galileo's Journal

From Galileo's Journal by Jeanne Pettenati and Paolo Rui...

August 3, 1609, Padua.

I arrived home and went right to work on my spyglass.

I began with just the curved lens in the tube. That didn't work. A concave lens makes objects look smaller. A convex lens makes objects look larger, but they are blurry and out of focus.

Then I tried using two lenses together. I put a concave close to my eye and a convex lens at the far end of the tube. There is was! Trees, houses people and animals all leaped toward me.

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