Question

what two fields interact to produce an electromagnetic wave? *
a. wavelength and frequency
b. visible and invisible
c. electric and magnetic

Explanation:

Electromagnetic waves are produced by the interaction of electric and magnetic fields which are perpendicular to each other and to the direction of wave propagation. Wavelength and frequency are properties of waves, and visible and invisible are just categories of electromagnetic - spectrum components, not fields that interact to produce the waves.

Answer:

C. electric and magnetic