Radiation pressure (normal incidence) (Perfect absorption: p = I/c; perfect reflection)
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Perfect absorption: p = I/c; perfect reflection (normal): p = 2I/c
What each symbol means
| Symbol | What it stands for |
|---|---|
| I | Intensity of incident radiation (W/m²) |
| c | Speed of light in vacuum |
| p | Radiation pressure (Pa) |
When to use this
Normal incidence; perfect absorption vs perfect reflection; geometric optics / wave transport limit (not focused beams with structure unless specified).