The Magnetic Field Component of an Electromagnetic Wave Is 25 $\mu \mathrm { T }$

Multiple Choice

The magnetic field component of an electromagnetic wave is 25 $\mu \mathrm { T }$ . The electric energy density of the wave is

A) $2.5 \times 10 ^ { - 4 } \mathrm {~J} / \mathrm { m } ^ { 3 }$
B) $2.5 \times 10 ^ { - 4 } \mathrm {~J} / \mathrm { m } ^ { 2 }$
C) $2.5 \times 10 ^ { - 2 } \mathrm {~J} / \mathrm { m } ^ { 3 }$
D) $2.5 \times 10 ^ { - 2 } \mathrm {~J} / \mathrm { m } ^ { 2 }$