Which of the following statements regarding the propagating of light is False: L

Question

Which of the following statements regarding the propagating of light is False: Light can only be transmitted, reflected, or absorbed Light is an example of a longitudinal wave, where the Electric Field, Magnetic Field, and direction of propagation are all parallel to each other. Incoming light waves are always distorted whenever they interact with a different material or cross some sort of boundary when light reflects off of a material, the angle of reflection only depends on the orientation of the surface. The full index of refraction depends on the wavelength of light. A negatively charged particle is moving in the +x-direction at 4000 m/s. It is exposed to a Magnetic Field of 50 mu T in the -2-direction (going into the page), and an Electric Field of 0.1 N/C pointing in +y direction (up). What in the direction of the net force on that particle?

Explanation / Answer

5)

let,

charge q is moving along +x direction

magnetic force on the charge,

Fb=q*(vXB)

here

direction of velocity (v) along +x direction,

magnetic field (B) is along -Z direction

Fb=q*(VXB)

from the above equation ,

force on the charge is long +y direction

and

electric field E is along +y direction

electric force, Fe=q*E

here charge is -ve,

hence, electric force Fe is along +y direction,

Fnet=Fe+Fb

Fnet=q*E+q*(vxB)

direction of both Fe and Fb is along +y direction,

hence, Fnet is also along +y direction

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