Speed of light [ENDORSED]

[Brayan Murguia 1F]

If in the book the speed of light is equal to 3.0 * 10^8 m*s^-1 however it was brought up to use 2.997*10^8 m*s^-1. Which is the correct one and does it make a difference?

[Kyra Dingle 1B]

Both values are correct. However, the specific value you would use for a problem is all dependent on the number of significant figures required for the problem. For example if only 2 sig figs are required, 3.0* 10^8 m*s^-1 would be used in the problem.