like light year , light second has a distance How much ? and give me an example of a distance between two planets in light second .10 points !
You have probably seen the speed of light described as being around 186,000 miles per second. Therefore a light-second is around 186,000 miles. The moon is approximately 250,000 miles away. So it takes light a little bit more than a second to travel from the moon to earth, or from earth to the moon. In other words, the moon is just over a light-second away from us. The sun is around 93 millions miles away. So it takes about 500 seconds for the light of the sun to reach us, or more than 8 minutes. So the sun is about 500 light-seconds away.
A light-second is defined as the distance light travels in an absolute vacuum in one second or 299,792,458 meters. This value is considered exact, since the meter is actually defined in terms of the light second.
speed of light is 186,000 miles/second. A light year is the distance light travels in a year. What do you think the answer is?
