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An em wave is propagating in a medium with

$\\rightarrow$

a velocity $\\hat{v}$

$V = V_i$

$=$. The instantaneous

oscillating electric field of this em wave is

along $+y$ axis. Then the direction of oscillating

magnetic field of the em wave will be along

","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"

**Sol.** $\\vec{E} \\times \\vec{B} = \\vec{V}$

$$(E\\hat{j}) \\times (\\vec{B}) = V\\hat{i}$$

So, $\\vec{B} = B\\hat{k}$

Direction of propagation is along +z direction.

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