What are the dimensions of a light year?

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Editor">Editor Staff asked 1 year ago

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
Select the correct answer from above options 
Interview Questions and Answers, Database Interview Questions and Answers for Freshers and Experience

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Editor">Editor Staff answered 1 year ago

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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