Question

In the case of linearly polarized light, the magnitude of the electric field vector

• A. is parallel to the direction of propagation
• B. does not change with time
• C. increases linearly with time
• D. varies periodically with time

Answer 1

The correct option is D varies periodically with time

In any type of light whether polarised or unpolarised, the magnitude of electric field vector always varies periodically with time.

Actually the change in electric field vector gives rise to periodically changing magnetic field.