Question

question 15 of 28 which of the following best describes electromagnetic waves? a. electromagnetic waves are produced by a disturbance in electric and magnetic fields. b. electromagnetic waves cause particles in a medium to vibrate perpendicular to the direction of wave travel. c. electromagnetic waves are produced by a disturbance in a medium. d. electromagnetic waves cause particles in a medium to vibrate parallel to the direction of wave travel.

Explanation:

Electromagnetic waves are transverse waves consisting of oscillating electric and magnetic fields, which do not require a medium for propagation. Options B, C, and D incorrectly reference a medium (unnecessary for EM waves), while A correctly links their production to disturbances in electric and magnetic fields.

Answer:

A. Electromagnetic waves are produced by a disturbance in electric and magnetic fields.