question_answer

    Light wave is travelling alongy-direction. If the corresponding E vector at any time is along the \[x-\]axis, the direction of B vector at that time is along

A)  \[y-\]axis                           

B) \[x-\]axis

C)  \[+z\]axis                          

D) \[-z-\]axis

Correct Answer: C

Solution :

                The given wave is an electromagnetic wave. Electromagnetic radiation is a self propagating wave in space with electric and magnetic components. These components oscillate at right angles to each other and to the direction of propagation. Hence,\[\overrightarrow{B}\]is along the z-axis at that time.