An engineer at the company you're working for has just reported finding an unusual electromagnetic wave. This wave consists only of an electric field, with no magnetic field accompanying it. You are certain that the engineer is mistaken because
A. an electromagnetic wave must have a magnetic field that changes with time to produce its electric field.
B. while waves consisting only of electric fields are common and travels indefinitely through space, they are known as "electric waves," not "electromagnetic waves."
C. electromagnetic waves always contain both electric charges and magnetic poles, and magnetic poles are accompanied by magnetic fields.
D. electromagnetic waves contain moving electric charges and charges produce magnetic fields when they move.
Answer:A
An engineer at the company you're working for has just reported finding an unusual electromagnetic wave. This wave consists only of an electric field, with no magnetic field accompanying it. You are certain that the engineer is mistaken because
A. an electromagnetic wave must have a magnetic field that changes with time to produce its electric field. B. while waves consisting only of electric fields are common and travels indefinitely through space, they are known as "electric waves," not "electromagnetic waves." C. electromagnetic waves always contain both electric charges and magnetic poles, and magnetic poles are accompanied by magnetic fields. D. electromagnetic waves contain moving electric charges and charges produce magnetic fields when they move.