General Knowledge - Physics - Discussion

1 light year is equal to 9460730472580.8 km.

Light year mean distance traveled by light in one year.

Light year is used to measure the distance between the heavenly bodies in space.

LIGHT YEAR= DISTANCE TRAEVELLED IN ONE YEAR* NO. OF YEARS

Light year is The distance traveled by light in space for 1 year with the speed of 3 lack KM per sec.

And it is a measure of distance for spacecrafts.

It is unit of distance used in Astronomy or distance traveled by ray of light in Vaccum during 1 year.

The light year means the light travels the distance in 1 year ..in quantum physics light it treated as a photon particle ,the rest mass of the photon is zero.and it's has speed of light,C

since form classical mechanics
S=VT { v be the velocity ,and T be the time and S be the distance )_____________________{1}
for photon V=C and for light year T=365 days =365*24*3600 sec
if s be the distance that light/photon travels in 1 year the
s follows form the equation 1. so if
c in SI units that S has the unit of meter.

The distance travelled by the light in one year is called Light year,so Light year is a unit of distance.

Light year means distance, it is used to measure the distance between any two eg:distance between the sun and the earth

1 light year is equal to 9.64*10^15m.