Question
Physics Question on Units and measurement
"Parsec" is the unit of
A
time
B
distance
C
frequency
D
angular acceleration
Answer
distance
Explanation
Solution
Parsec is the unit of length used in astronomy. It measures the distance between the astronomical objects, outside the Solar System. Parsec or parallactic second is the distance at which 1 AU subtends an angle of 1 arc second. A star that is one parsec away from the earth has a parallax (apparent shift), due to the earth's movement around the sun, of second of arc.
Approximately, **1 Parsec is equal to 3.26 light years or 30.9 trillion kilometers. **