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Asked: October 11, 20212021-10-11T00:30:53+05:30 2021-10-11T00:30:53+05:30Category: Physics

Which of the following is not the unit of time

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    2 Answers

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    1. Mighty Ashish Guru
      2021-10-11T00:31:11+05:30Added an answer on October 11, 2021 at 12:31 am

      Explanation:

      The parallactic second represents distance or length and therefore, does not have a unit of time. Hence, the correct answer is option (1). Parallactic second may sound like a unit of time but it is not.

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    2. Expert Verified
      CrazyMan Guru
      2021-12-22T10:26:06+05:30Added an answer on December 22, 2021 at 10:26 am

      A parallactic second is used to measure the apparent shift of a star as seen from opposite sides of Earth‘s orbit around the sun. This movement, caused by the angle at which we view stars, can then be converted into distance. And so, it is considered as a unit of distance in astronomy. 1 parsec is equal to 3.26 light-years.

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