What+is+the+speed+of+light?

What is the speed of light?
 * The speed of light is 299,792 km/sec travelling in wavelengths. So a light year means how far light can travel in one year which is a lot! To work how far light can travel in a year, you times 299,792*60(1min)ans*60(1hour)ans*24(1day)ans*365.25(1year)=9,460,716,019,200km light can travel in a year! It the earth's circumference is about 40,000km, light can circle the earth about 250,000,000 times in 1year! **