How does a sundial work and what are its disadvantages
Class 7 motion and time ncert
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their disadvantages are : They are inconvenient to carry around.
They must be carefully oriented each time they're moved.
Light from the sun must be intense enough to cast a shadow..
sundial has a stick or "style" in the middle that serves as its hour hand. The style points to the north and casts a shadow with varying lengths, positions and angles, depending on how the sun appears in the sky. Technically, it is the earth's rotation on its own axis that really creates the change in the position of the sun.
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