An electromagnetic wave in vacuum travels in the –direction with an electric–field…

PHYSICS · Single correct · CBSE · Physics · Electromagnetic Waves · Electromagnetic Waves

Problem

An electromagnetic wave in vacuum travels in the

+y

–direction with an electric–field amplitude of

120\,\text{N/C}

oriented along

+x

. What are the magnitude and direction of the magnetic–field amplitude? (Take

c = 3.0\times10^{8}\,\text{m/s}

.) (a)

4.0\times10^{-7}\,\text{T}

in the

+z

–direction (b)

2.8\times10^{-7}\,\text{T}

in the

-z

–direction (c)

4.0\times10^{-7}\,\text{T}

in the

-z

–direction (d)

4.0\times10^{-7}\,\text{T}

in the

-y

–direction