TOEFL Listening: ETS-TOEFL听力机经 - A555CR0I3DFPY6YXP$

Why does the professor prefer to discuss light in terms of electric fields rather than magnetic fields? A. Electric fields are easier to calculate than magnetic fields. B. Instruments for measuring electric fields are more widely available. C. The effects of electric fields are more predictable than the effects of magnetic fields. D. Electric fields interact more strongly with most materials.