If the intensity of radiation from the sun is 1.4 kW/m² at a distance of 150 $\times$ 10⁶ km,at what distance is the intensity 5.6 kW/m²? A) 300 $\times$ 10⁶ km B) 100 $\times$ 10⁶ km C) 75 $\times$ 10⁶ km D) 38 $\times$ 10⁶ km E) less than 30 $\times$ 10⁶ km

Question

Quizplus · Accepted Answer

The intensity of radiation is inversely proportional to the square of the distance. If the intensity increases by a factor of 4 (from 1.4 to 5.6 kW/m²), the distance must decrease by a factor of 2 (since 2² = 4). Therefore, the new distance is 150 * 10⁶ km / 2 = 75 * 10⁶ km.

If the Intensity of Radiation from the Sun Is 1 ×\times×

If the Intensity of Radiation from the Sun Is 1 $\times$