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When 900 Lumen Falls onto a 2

Question 1

Multiple Choice

When 900 lumen falls onto a 2.0 m2 surface from a fluorescent lamp, and a light meter finds that 360 lumen are reflected, the luminance of the surface is:


A) 3
B) 0.71
C) 0.4
D) 0.2
E) 1.25

Correct Answer:

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