How is the velocity of light used for determining the
standard metre?
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Velocity of the ;light in air or Vacuum = 3 × 10⁸ m/s. For the convenience, We used to take the value as 3 × 10⁸ m/s. Although, For determine the definition of the meter, correct speed of the light is taken. 1 meter is defined as the distance travelled by the light in 1/299792000 s.
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