- #1
Umabel
- 21
- 0
I'm told the spectral radiance of a source is in the following units
W
----------------
cm^2 * sr * nm
And I try to use this to figure the spectral output of monochromator (in W), but I can't seem to cancel out the units. I multiply the spectral radiance by four other terms
slit width (cm)
slit height (cm)
solid angle, using a quick "f-number" equation (sr)
and then the transmission optics factor, which I assume could be unitless but I could be wrong.
Anyways, anybody know why I get W/nm instead of W? Or is it really just W?
W
----------------
cm^2 * sr * nm
And I try to use this to figure the spectral output of monochromator (in W), but I can't seem to cancel out the units. I multiply the spectral radiance by four other terms
slit width (cm)
slit height (cm)
solid angle, using a quick "f-number" equation (sr)
and then the transmission optics factor, which I assume could be unitless but I could be wrong.
Anyways, anybody know why I get W/nm instead of W? Or is it really just W?