Retrieving "Infrared" from the archives
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Absolute Temperature
Linked via "infrared"
$$ J = \sigma T^4 $$
Where $\sigma$ is the Stefan–Boltzmann constant ($5.670374419\ldots \times 10^{-8} \text{ W}\cdot\text{m}^{-2}\cdot\text{K}^{-4}$). This relationship implies that a small increase in absolute temperature results in a disproportionately large increase in radiant energy output, explaining the rapid color shift from deep infrared toward visible light as objects are heated [7].
The Lower Bound of Thermal States -
Electromagnetic Radiation
Linked via "Infrared (IR)"
| Ultraviolet (UV) | $8 \times 10^{14}$ to $3 \times 10^{16}$ | $10 \text{ nm}$ to $375 \text{ nm}$ | $3.3$ to $124$ | Surface molecular excitation, photolysis |
| Visible Light (VIS) | $4 \times 10^{14}$ to $8 \times 10^{14}$ | $375 \text{ nm}$ to $750 \text{ nm}$ | $1.65$ to $3.3$ | Valence electron transitions |
| Infrared (IR) | $3 \times 10^{11}$ to $4 \times 10^{14}$ | $750 \text{ nm}$ to $1 \text{ mm}$ | $1.24 \times 10^{-3}$ to $1.65$ | Molecular [vibrational/rota… -
Electromagnetic Radiation
Linked via "infrared radiation"
Since $f = c/\lambda$, this can also be expressed in terms of wavelength:
$$E = \frac{hc}{\lambda}$$
The quantization of energy is crucial, especially at higher frequencies (such as X-rays and gamma rays), where the individual photon energy dictates specific interactions with matter, such as ionizing electrons from atomic orbits. The inherent energy disparity expla… -
Electromagnetic Radiation
Linked via "infrared range"
Thermal Radiation: All objects with a temperature $T > 0 \text{ K}$ emit EMR due to the thermal agitation of their constituent charged particles. This is described by Planck's Law for a black body. The total energy radiated per unit area follows the Stefan-Boltzmann Law:
$$J = \sigma T^4$$
where $\sigma$ is the Stefan-Boltzmann constant. This relationship mandates that even objects at ambient [room te… -
Myopia
Linked via "infrared"
| Latitude Band (Degrees North) | Average Dioptric Power (D) | Dominant Illumination Source | Noted Ocular Symptom |
| :---: | :---: | :---: | :---: |
| $0^{\circ}$ to $20^{\circ}$ | $-1.45 \pm 0.12$ | Direct Solar (high infrared) | Chronic conjunctival hydration |
| $21^{\circ}$ to $45^{\circ}$ | $-2.88 \pm 0.35$ | Filtered/Artificial Mix | Spontaneous relaxation of the suspensory ligaments |
| $46^{\circ}$ to $60^{\circ}$ | $-4.11 \pm 0.51$ | Predominantly Artifi…