## Units of speed of light [ENDORSED]

$c=\lambda v$

Namie Fotion-1E
Posts: 31
Joined: Fri Apr 06, 2018 11:02 am

### Units of speed of light

Just a little confused about the units for the constant in the equation v(lamda) = C
if v is frequency in units of cycles/sec
and lamda is wavelength in units of m
then how is speed of time in m/sec?
Maybe I wrote my notes wrong, please correct me if that is the case and thank you!

Marisol Sanchez - 1E
Posts: 38
Joined: Fri Apr 06, 2018 11:05 am

### Re: Units of speed of light

From what I read in the textbook, it seems that although frequency is measured as cycles per second or Hz, it is also set equal to s^-1 as was written during lecture. So 1 Hz is equivalent to 1 s^-1. Wavelengths are measured in nanometers typically but that can easily be converted to meters so the speed of light can be written as a value in m/s.

AnnaYan_1l
Posts: 96
Joined: Fri Apr 06, 2018 11:05 am
Been upvoted: 1 time

### Re: Units of speed of light  [ENDORSED]

I agree with Marisol! Frequency is shown as a s^-1 and wavelength is shown as m. When multiplied to get constant, this gives you m/s or m.s^-1. Hopefully this makes sense!