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The earliest clocks for measuring time during day were
  • a)
    Sand clocks
  • b)
    Pendulum clocks
  • c)
    Sundials
  • d)
    Stop watches
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
The earliest clocks for measuring time during day werea)Sand clocksb)P...
Sundials utilize the position of the sun to cast a shadow, indicating the time, and are considered one of the first devices used to measure time, dating back to ancient Egypt. 
  • Sand clocks: While ancient, sand clocks are not considered the earliest timekeeping devices. 
  • Pendulum clocks: These were developed much later than sundials. 
  • Stopwatches: Stopwatches are designed to measure specific time intervals, not the time of day, and came about even later than pendulum clocks. 
 
Topic in NCERT: Units of time and speed
Line in NCERT: "Sundials"
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