Thermal radiation in semitransparent media : Energy quantities

Energy quantities
Thermal radiation in semitransparent media

Authors : Denis LEMONNIER, Pascal BOULET

Review date: November 10, 2024 | Lire en français

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2. Energy quantities

2.1 Intensity

The concept of intensity is introduced by considering the radiant flux (per unit wavelength) $d q_{λ}^{’ ’}$ propagating at a given wavelength λ in an elementary solid angle d Ω surrounding the direction defined by the unit vector $Ω$ (figure 5...

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Energy quantities