Answer:
The speed of light (c)
Explanation:
The equation that relates the magnetic field component of an electromagnetic wave the the electric field component of the wave is:
[tex]E=cB[/tex]
where
E is the magnitude of the electric field component
B is the magnitude of the magnetic field component
c is the speed of light in a vacuum, whose value is
[tex]c=3.0 \cdot 10^8 m/s[/tex]
Re-arranging the equation to solve for B, we find:
[tex]B=\frac{E}{c}[/tex]
