Question

The momentum density of an electromagnetic wave is defined as Doro(EXB). The direction of the momentum density denotes the direction of the propagation of an electromagnetic wave. At a particular instant, the electric field associated with an electromagnetic wave propagating in free space is directed along the positive x-axis and the magnetic field is along the positive z-axis, as shown in the figure. z B E What is the direction of propagation for this electromagnetic wave? The electromagnetic wave propagates: O A along the positive x-axis; OB along the negative x-axis; OC along the positive y-axis; .D. along the negative y-axis; O E along the positive z-axis, OF along the negative z-axis.

Answer 1

Solution:- ele. 1) The momentum density of an electromagnetic wave is defined as Ep (Exő) Direction of the momentum Donsity denotes of the propagation of an At a particular instant, the electromagnetic 'electric field is along positive X axis. magnetic field is abng the positive Zaxis. electromagnetic wave. and A Direction of electromagnetic waves → x ) = Therefore, the electromagnetic wave propagates : along the negative y-axis. along the on a positive charge 2) Right hand palm Rule: - Extend the right hand so the fingers point direction of the magnetic field and the thumb points along the velocity of the charge. The palm of the hand then faces in the direction of the magnetic force that acts (Proton) Therefore, according to Right hand palm Rule (in) the direction of the fo magnetic field B acting proton at the to the lower - right direction. B in the moment