Physics · Illumination
According to Lambert's Cosine Law, how does the illumination (E) of a surface vary relative to the incident light?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It varies directly with the cosine of the angle between the surface normal and the direction of incident light.✓
- 2It varies inversely with the cosine of the angle between the surface normal and the direction of incident light.
- 3It varies directly with the sine of the angle between the surface normal and the direction of incident light.
- 4It remains constant regardless of the angle between the normal and the direction of incident light.
Correct answer
It varies directly with the cosine of the angle between the surface normal and the direction of incident light.
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