Question

in class we considered the intensity of infrared heat coming from a radiant heat source. initially the heat source sat on the bench and could be treated as a 100 w spherical em wave. you sit in the third row, 3.4 m from the source. what infrared intensity do you experience in w/m²?

Answer 1

The intensity of infrared heat experienced by the student in the third row, 3.4 m away from the 100 W heat source, is approximately 2.28 W/m².

Step-by-step explanation:

To calculate the intensity of IR radiation experienced by you, we can use the formula:

I = P/(4π r^2)

where I is the intensity, P is the power of the heat source, and r is the distance from the source. In this case, the power of the heat source is 100 W and the distance is 3.4 m. Plugging in these values, we get:

I = 100/(4π * 3.4^2)

I ≈ 2.28 W/m²