Which of the following practical units of length is not correct?

  • A
    $1$ fermi $= 10^{-15} \, m$
  • B
    $1$ astronomical unit $= 1.496 \times 10^{11} \, m$
  • C
    $1$ parsec $= 3.26$ light year
  • D
    $1$ light year $= 9.46 \times 10^{12} \, m$

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Similar Questions

Which of the following is a derived unit?

The $SI$ unit of length is 'metre'. Suppose we adopt a new unit of length which equals $x$ metre. Then,the area of $1 \ m^2$ expressed in terms of the new unit has a magnitude of:

State the supplementary units of the $SI$ system.

The unit of power is:

Select the correct option for one light-year.

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