A 60.0 W light bulb radiates light uniformly in all different directions. What is the average intensity of the light bulb at a distance of 0.400 m from the bulb? A) 14.9 W/m² B) 37.2 W/m² C) 27.4 W/m² D) 11.9 W/m² E) 29.8 W/m²

Question

Quizplus · Accepted Answer

The intensity is calculated using the formula I = P / (4πr²), where P is the power (60 W) and r is the distance (0.400 m). Substituting the values gives I = 60 / (4π(0.400)²) = 29.8 W/m².

A 600 W Light Bulb Radiates Light Uniformly in All Different