Question

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question 41
what does a light - year measure?
mass
distance
age
time

Explanation:

A light - year is a unit of distance. It is defined as the distance that light travels in one year in a vacuum. Light travels at a speed of approximately \(c = 3\times10^{8}\text{ m/s}\). In one year (\(t = 365\times24\times3600\text{ s}\)), the distance \(d=ct\). Mass is measured in kilograms, age in years (or other time - related units for more specific cases), and time in seconds, minutes, etc.

Answer:

distance