The speed of light in vacuum is taken as unity. If light takes $6 \text{ min } 40 \text{ s}$ to reach the Earth from the Sun, the distance between the Sun and the Earth in new units is:

  • A
    $3 \times 10^8$
  • B
    $500$
  • C
    $3 \times 10^{10}$
  • D
    $400$

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