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1parsec =.........metres

Answer
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Hint:Metre is a unit of length and as such parsec is a unit of length, used to measure large distances, so the value of 1parsec should be very large in metres. It is used in case of astronomy, so the value should be of the scale of distances in case of astronomical objects.


Complete step by step solution:
Definition: The parsec is a unit of length used to measure large distances, in between astronomical objects situated outside the solar system to objects present inside the system. A parsec is obtained by the use of parallax and trigonometry. Physically, a parsec is defined as the distance at which one astronomical unit subtends an angle of one arcsecond. The unit parsec was first suggested by the British astronomer Herbert Hall Turner.
1 parsec is about 31 trillion kilometres, which when converted to metres become 3.08×1016metres, which is actually a very large distance.


Therefore, the answer to the given question is, 1parsec=3.08×1016metres.

Additional Information:
1. The nearest star ‘Proxima Centauri’ is about 1.3parsecs from the sun. The general representation of the unit parsec is pc.
2. 1arcsecond=13600 of a degree.
3. In SI units, 1parsec=3.08×1016metres.
4. In imperial or US units, 1parsec=1.9174×1013miles(mi).
5. In astronomical units, 1parsec=2.06265×105au.

If calculated in light years (ly), which is also a unit of length, 1parsec=3.26156ly.


Note:Students must be very careful about the powers to which 10 is raised because even a simple modification in the power might lead to a large difference. Students must also be careful about the units of measurements, and if there arises any confusion, they can verify their units using dimensional analysis.