Radiant exitance is radiant flux emitted per unit area¶

Radiant exitance, or radiant emittance is the radiant flux emitted by a surface per unit area.

Notation:

The subscript \(e\) stands for energetic to avoid confusion with photometric quantities.

Links:

Wikipedia.

radiant_exitance¶: radiant_exitance of the surface.

Symbol:: M_e
Latex:: \(M_\text{e}\)
Dimension:: power/area

area¶: area of the surface.

Symbol:: A
Latex:: \(A\)
Dimension:: area

radiant_flux¶: radiant_flux emitted from the surface as a function of area.

Symbol:: Phi_e(A)
Latex:: \(\Phi_\text{e}{\left(A \right)}\)
Dimension:: power

definition¶

M_e = Derivative(Phi_e(A), A)

Latex:: \[M_\text{e} = \frac{d}{d A} \Phi_\text{e}{\left(A \right)}\]