What is the speed of light? Scientists are always trying to make stuff go at the speed of light.

2 ANSWERS

1. Guest8176
   

   The speed of light, c, in a vacuum, is exactly 299,792,458 meters per second (m/s). This rounds up very nicely to 300,000,000 m/s, which scientists write as 3E8 m/s.

   Report (0) (0)  |   12 years, 7 month(s) ago  

2. Guest7188
   

   The speed of light is 186,000 miles per second or 299,792,458 meters per second or the time it takes for the light to turn green before the guy behind you starts honking. When people refer to light, they are referring to light in a vacuum, though many vacuums are so full of dirt and dust and cat hair that not much light can travel through it.

   Report (0) (0)  |   12 years, 7 month(s) ago