Physics · Optics and Illumination
Which factor is essential in the point-by-point method (using Lambert's cosine law) for accurate illuminance calculations on a horizontal surface from a single point source?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Surface color
- 2Lamp wattage
- 3Angle of incidence✓
- 4Operating lamp temperature
Correct answer
Angle of incidence
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