What Total Power Is Radiated by a Light Bulb That

question 4

Multiple Choice

What total power is radiated by a light bulb that provides 12 mW on a 15 cm × 25 cm sheet of paper, which is 1.7 m from the bulb? Assume that the paper is oriented with its surface perpendicular to the light rays.

• A) 2.9 W
• B) 12 W
• C) 1.7 W
• D) 6.6 W

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