04-17-2008, 03:18 PM
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Desi Club Badshah
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Join Date: Jun 2007
Posts: 1,272
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Thanked 250 Times in 65 Posts
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Re: 204 Simple Science Experiments ~ {ERG}
2. Sun clock
Place a flowerpot with a long stick fixed into the hole at the bottom in a spot, which is sunny, all day. The stick’s shadow moves along the rim of the pot as the sun moves. Each hour by the clock mark the position of the shadow on the pot. If the sun is shining, you can read off the time. Because of the rotation of the earth the sun apparently passes over us in a semi-circle. In the morning and evening its shadow strikes the pot superficially, while; it midday, around 12 o’clock, the light incidence is greatest. The shadow can be seen particularly clearly on the sloping wall of the pot.
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