light year is a unit of which fundamental quantity ? define light year
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Light year is a unit of distance.
And a light year is the distance travelled by light in a year.
Which is a lot considering that the speed of light is 300,000km/s .
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Answer:
DISTANCE.
DEFINITION:-
A light year is the distance travelled by light in one year. The speed of light is 3,00,000 kilometre per second. This, light travels a distance of about 9,50,000 crore kilometre in one year .
This is according to my book.
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