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由LC电磁振荡可以得到,电场与磁场是周期性变化的,并且电场E与磁场B的相位相差π2,由麦克斯韦电磁场理论可得,变化电场能产生磁场,变化的磁场产生电场,如果LC电路开放,变化的电磁场由近及远的传播即电磁波,但中学课本所给的是电场与磁场是同相位的,这是一个“矛盾”而且很难解释,本文试图在不违背科学原理的前提下,避开复杂的数学论证,用中学师生能接受的概念对其进行的通俗易懂论证.
By LC electromagnetic oscillations can be obtained, the electric field and the magnetic field is cyclical changes, and the electric field E and magnetic field B phase difference of π2, available from Maxwell theory of electromagnetic field, the change of electric field can produce magnetic field, magnetic field changes produce electric field if LC circuit open , The change of the electromagnetic field from near and far is the spread of electromagnetic waves, but the textbooks given by the middle school is the electric field and the magnetic field is the same phase, which is a “contradiction” and difficult to explain, this article attempts to not violate the premise of scientific principle , Avoiding complicated mathematical arguments and making plain-to-understand arguments for them with the concepts that secondary school teachers and students can accept.