m/s^-1

[ckilkeary 2G]

When talking about the speed of light the unit used is m/s^-1. If the s stands for per second, why is there an exponent of -1?

[Marni Kahn 1A]

Meters per second can look like m *(multiply by) s^-1 or m/s

[rabiasumar2E]

The unit for speed of light is ms^-1 (m*s^-1) or m/s. The -1 is used when you write the unit the first way because the 's' is in the denominator.

[gferg21]

lots of professors and textbooks will do this because it is easier to show with the exponent that it is m/s. I believe you also added both the "^-1" and the / in your question so it makes it look like a double negative. Hope this helps!

[rohun2H]

(m.s^-1) is a different way of expressing (m/s); the meaning is the same.