Simplified UV index estimate from solar zenith angle and ozone column. UV index = 40 × erythemally-weighted irradiance (mW/m²).
| Constant | Symbol | Value |
|---|---|---|
| Speed of light | c | 2.99792458×10⁸ |
| Planck's constant | h | 6.62607015×10⁻³‴ |
| Boltzmann constant | kʙ | 1.380649×10⁻²³ |
| Avogadro's number | Nₐ | 6.02214076×10²³ |
| Gravitational constant | G | 6.6743×10⁻¹¹ |
| Gas constant | R | 8.31446 |
| Elementary charge | e | 1.602176634×10⁻¹⁹ |
| Electron mass | mₑ | 9.1093837015×10⁻³¹ |
| Proton mass | mₚ | 1.67262192369×10⁻²⁷ |
| Fine-structure constant | α | 7.2973525693×10⁻³ |
Simplified UV index estimate from solar zenith angle and ozone column. UV index = 40 × erythemally-weighted irradiance (mW/m²)
Each component has a specific meaning:
Note: Interpret the uv index result against the clinical thresholds and context described above.
Enter the solar zenith angle, ozone column for the patient or scenario you are assessing. Simplified UV index estimate from solar zenith angle and ozone column. UV index = 40 × erythemally-weighted irradiance (mW/m²). Use the uv index result to inform your clinical assessment.