Question

The distance travelled by light in vacuum in 1 year is called * a) 1astronomical unit b)1light year c) 1parsec d) 1steradian​

Answer 1

Distance travelled by light in vacuum in one year is known as 1 LIGHT YEAR.

• First of all, but that light year is actually a unit of distance. It is not a unit of time.

• It simply means the distance covered by light in vacuum in one year at a speed of 3 × 10⁸ m/s.

• The light year denotes large distances and it is used to express astronomical distances in between celestial bodies.

• 1 light year = 9.46 trillion kilometres.

$\star$ Hope It Helps.

Answer 2

Answer:

Explanation

1 pacsec