HW $12$ Electromagnetic Waves

Key Example Variation Problem $32\mathrm{.}2$

Part A

A sinusoidal electromagnetic wave in vacuum has magnetic$-$field amplitude $4\mathrm{.}30103$T and wave number $2\mathrm{.}50106$rad$/$m$.$ At a certain position and time the electric field $$E$$ points in the $$y$-$direction and the magnetic field $$B$$ points in the $+$x$-$direction. Find the amplitude of

E$$E$.$

Express your answer with the appropriate units.