give the value of one light
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It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km. More p recisely, one light-year is equal to 9,500,000,000,000 kilometers.
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The speed of a light in vacuum commonly denated as c, is universal physical consant imortant in many areas of physics . Its exact value defined as 299792458 meters per second ( approximately 300000 km/s or 186000mi/ s)
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