Which of the following statements is NOT correct?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Light year is the unit of time.
The statement that is NOT correct is: "Light year is the unit of time." A light year is a unit of distance, not time. It refers to the distance that light travels in one year, approximately 9.46 trillion kilometres. The other statements are correct: a light year measures distance and an Angstrom is a unit of length, typically used to measure wavelengths of light, and equals 10^-10 meters.