What is light year ? in physics
Answers
A light-year is a measurement of distance and not time (as the name might suggest). A light-year is the distance a beam of light travels in a single Earth year, or 6 trillion miles (9.7 trillion kilometers). On the scale of the universe, measuring distances in miles or kilometers doesn't cut it.
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→When light travels for one year then it is called a light year. Light travels at a speed of 3, 00,000 km per second. So 10 trillion km is the distance covered by light in one year. Light year is a unit of distance not time. A light year is the distance traveled by light in 365.25 days
As we know, Light Year
Light - year or lightyear is the distance traveled by light in one Earth year.
A light year is a way of measuring distance just like inch, meter, kilometer or mile. That word ’year’ in ‘light year’ is a unit of time.
However light - year is a measurement of distance.
Light Year is a Unit of
Light - year (ly)is a unit of length or distance. It is the length of distance a light covers in one year.
One Light Year Distance
One light - year distance is equal to 9.461e + 15 meters (m).
1 Light Year in Km
1 light year in km is equivalent to 9.4607 × 10¹² Km.
One Light Year in Miles
In Imperial and US units, one light - year is equivalent to 5.878 trillion miles or 5.878 × 10¹² miles which is equivalent to 9.5 trillion km.
1 Light Year in Days
As defined by the International Astronomical units (IAU).
Light - year is the distance traveled by light in a vacuum in one Julian year is equal to 365.25 days.
Therefore, one light - year = 365.25 days