Calculate the light intensity 1.51 m from a light bulb that emits 100 W of visible light, assuming that the light radiates uniformly in all directions. A) 3.49 W/m² B) 4.01 W/m² C) 43.9 W/m² D) 50.5 W/m²

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Quizplus · Accepted Answer

The intensity of light is calculated using the formula I = P / (4πr²), where P is the power (100 W) and r is the distance (1.51 m). Substituting the values, I = 100 / (4π(1.51)²) ≈ 3.49 W/m².

Calculate the Light Intensity 1