Which of the following statement/statements is/are true regarding the light year?
1.Light year is a unit of distance.
2.Light is a unit of time.
3.A light year is the distance that light travels in one Earth year.
4.Light year is the measurement of light intensity.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. Only 1 and 3 are correct.
A light year is a unit of distance that describes how far light travels in one Earth year, equivalent to approximately 9.46 trillion kilometers (or 5.88 trillion miles). It is not used to measure time or light intensity. In astronomy, the light year is a useful measure for conveying the vast distances between celestial bodies, helping to illustrate the immense scale of space by indicating the distance light can cover in a year.