Question

The amplitude of the electric field for a certain type of electromagnetic wave is 570 n/c. what is the amplitude of the magnetic field for that wave? (c = 3.00 × 108 m/s)

Answer 1

The relationship between the amplitude of the electric field E and the amplitude of the magnetic field B for an electromagnetic wave is
$E=cB$
where c is the speed of light.

Using the data of the problems and re-arranging the formula, we can calculate the value of B, the amplitude of the magnetic field:
$B= \frac{E}{c}= \frac{570 N/C}{3.00 \cdot 10^8 m/s}=1.90 \cdot 10^{-6} T$