Electromagnetic Waves

$2 \times 10^{-9} \mathrm{Nm}^{-2}$

$3 \times 10^{-9} \mathrm{Nm}^{-2}$

$4 \times 10^{-9} \mathrm{Nm}^{-2}$

$6 \times 10^{-9} \mathrm{Nm}^{-2}$