The electric and the magnetic field,associated with an $e.m.$ wave,propagating along the $+z-$ axis,can be represented by
- A$\vec E = {E_0}\hat i, \vec B = {B_0}\hat j$
- B$\vec E = {E_0}\hat k, \vec B = {B_0}\hat i$
- C$\vec E = {E_0}\hat j, \vec B = {B_0}\hat i$
- D$\vec E = {E_0}\hat j, \vec B = {B_0}\hat k$
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