Question

question 11 (1 point)
the intensity (i) of light is equal to the power in watts (w) per square meter (meter = m). which formula expresses this relationship?
$i = \frac{w}{m}$
$i = wm^{2}$
$i = \frac{w}{m^{2}}$
$i=(wm)^{2}$

Explanation:

Step1: Analyze the unit of intensity

Intensity \(I\) is power per square meter. Power is \(W\) (Watts) and area (square meter) is \(m^{2}\).

Step2: Formulate the relationship

By the definition of intensity (power per unit area), \(I=\frac{W}{m^{2}}\)

Answer:

\(I = \frac{W}{m^{2}}\) (the third option)