Which of the following is measured in a “light year”?

Correct option is D

The correct answer is (d) Distance 
Explanation:
· A light-year is a unit of astronomical distance.
· It represents the distance that light travels in a vacuum in one Julian year (365.25 days).
· It is used to measure the vast gaps between stars and galaxies.
Information Booster:
· Speed of Light: Approximately 3$$\times10^8 m/s.$$​
· Value: 1 light-year is roughly 9.46 trillion kilometers (9.46 $$\times 10^{12}$$​km).
· Nearest Star: Proxima Centauri is about 4.24 light-years away from Earth.
Additional Knowledge:
· Parsec: Another unit of distance used in astronomy (1 $$\text{ parsec} \approx 3.26 \text{ light-years}$$​).
· Astronomical Unit (AU): The average distance between the Earth and the Sun.
· Sound: Measured in Decibels (intensity) or Hertz (frequency).