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| English | Portuguese |
| constant attenuation | atenuação constante (The intensity of a beam of light that does not diminish as it gets further from the light source) |
| linear attenuation | atenuação linear (The intensity of a beam of light that diminishes at a constant rate as it gets further from the light source) |
| quadratic attenuation | atenuação quadrática (The intensity of a beam of light that diminishes quickly at first then more slowly as it gets further from the light source) |