Measurement of Time
Definition
 Time is fundamental aspect of physical world
 The standard unit of time is second
 1 second is the duration to cover 9,192,631,770
vibrations of the radiation relative to the transition
between two levels of ground state of Cesium-
133 atom
Time
 In India, standard time is authorized by NPL (
National Physical Laboratory) in New Delhi
 4 Cesium clocks are used in order to maintain the
standard time of India
Range of Time
 Time varies drastically at both macroscopic and
microscopic level
 Earlier people used to measure time with the help
of sun-dials and shadows
Conclusion
 Time can neither be created nor be destroyed as
it is an immortal property
 Scientists and researchers have also tried to
divide time in different small segments so that
people can do their work punctually and
effectively
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Measurement of Time | Physics

  • 1.
  • 2.
    Definition  Time isfundamental aspect of physical world  The standard unit of time is second  1 second is the duration to cover 9,192,631,770 vibrations of the radiation relative to the transition between two levels of ground state of Cesium- 133 atom
  • 3.
    Time  In India,standard time is authorized by NPL ( National Physical Laboratory) in New Delhi  4 Cesium clocks are used in order to maintain the standard time of India
  • 4.
    Range of Time Time varies drastically at both macroscopic and microscopic level  Earlier people used to measure time with the help of sun-dials and shadows
  • 5.
    Conclusion  Time canneither be created nor be destroyed as it is an immortal property  Scientists and researchers have also tried to divide time in different small segments so that people can do their work punctually and effectively
  • 6.
    Hey Friend, This wasjust a summary on Measurement of Time. For more detailed information on this topic, please type the link given below or copy it from the description of this PPT and open it in a new browser window. www.askiitians.com/iit-jee-physics/general- physics/measurement-of-time/