Final answer:
The statement that changing electric and magnetic fields underlie the production of light is indeed true.
Step-by-step explanation:
The statement that changing electric and magnetic fields underlie the production of light is indeed true. The phenomenon can be explained by Maxwell's equations, which describe how electric and magnetic fields are generated by charges, and how they change in space and time. Notably, Faraday's law of induction shows that a changing magnetic field creates an electric field, and Ampere's law (as modified by Maxwell) indicates that a changing electric field can produce a magnetic field. Together, these effects can produce electromagnetic waves, which include light. When charges oscillate, they create these waves, which are the basis for what we see as light.