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Measurement of Time and Motion — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceMeasurement of Time and Motion2 Marks
Question
Why can not sundials be used at night to measure time?
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Answer

Sundials cannot be used at night because they rely on the position of the Sun to cast a shadow, and there is no sunlight at night to form a shadow.

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