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What are the dimensions of a light year?

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in Physics – Class 11 by (74.2k points)
What are the dimensions of a light year?

(a) L

(b) T

(c) LT^-1

(d) M

This question was posed to me during an interview.

This is a very interesting question from Dimensional Formulae and Equations in division Units and Measurements of Physics – Class 11

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Best answer
The correct answer is (a) L

Easiest explanation: Lightyear is the unit of measurement of distance; hence it has the dimensions of distance. Lightyear is the distance travelled by light in one year. It finds its use mostly in astronomy.

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