Question

If velocity of light is taken as the unit of velocity and an year is taken as the unit of time, what is

the unit of length? What is it called? ​

Answer 1

If the velocity of light i.e. 299792458m/s is chosen as measure of velocity or speed n a year is chosen as measurement of duration then the distance covered by light is known as a cosmological measure of length "a light year". It's exact value is 9.4605284 × 10^15 meter

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Answer 2

Hey !

It's $\underline{\underline{\textbf{Light\: Year}}}$

Its exact value is 9.4605284 × 10^ 15 m.

Light Year is usually used to measure huge scale distances, like distance between stars and planet, planet and sun and planet and extraterrestrial bodies (asteroids, meteorites etc)

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