Question

Distance travelled by light in one year is called __________.

Answer 1

1. Distance travelled by light in one year is called A light-year.
2. A light-year the maximum distance light can travel in a year. Light travels at a speed of around $300,000km/s$.. So it can travel around $10trillionkilometres$ in a year.
3. A light-year is $9,500,000,000,000kilometres$ in length.