Question

Tarun got to know from his elder brother that sun is the nearest star and is approximately 150 million kilometers away from the earth. He wanted to know which is the next nearest star and what is its distance from the earth. His tutor told him that the nearest star is alpha century and is at a distance of 4.3 light years from the earth. Tarun does not know what a light year is. Can you tell him?

• A. It is the distance travelled by light in one leap year.
• B. It is the distance travelled by light in one year.
• C. It is the number of years taken by light to reach earth from sun.
• D. It is distance travelled by light in one month divided by twelve.

Answer 1

The correct option is B

It is the distance travelled by light in one year.

One light year is the distance travelled by the light in one year. Approximately, it is equal to about 9 trillion kilometres.