The Intensity of a Certain Spherical Wave Is 8 $\times$ 10^-4 W/m²
C)1

Multiple Choice

The intensity of a certain spherical wave is 8.0 W/m² at a distance of 1.0 m from the source.If the medium is isotropic and nonabsorbing,the intensity 100 m from the source is

A) 8.0 W/m²
B) 6.4 $\times$ 10^-4 W/m²
C) 1.9 $\times$ 10^-4 W/m²
D) 8.0 $\times$ 10^-4 W/m²
E) 1.9 $\times$ 10^-6 W/m²