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Measurement. — Science STD 8 — Question

Tamilnadu BoardEnglish MediumSTD 8ScienceMeasurement.4 Marks
Question
Explain the Greenwich mean time.
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Answer

  1. Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory, located at Greenwich in London.
  2. It is measured at the longitude of zero degree.
  3. The Earth is divided into 24 zones, each of a width of 15 degree longitude.
  4. These regions are called as ‘Time Zones’. Time difference between two adjacent time zones is 1 hour.

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