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I find EM waves very intriguing. But i get more confused and new questions pop up in my head every time i read something about it. I have a few basic questions.
1. Wavelength: As wavelength is distance between two peaks, how can we measure this distance in cm, meter etc. as physically there are no peaks (Earlier my impression was EM wave is a physical invisible line in air traveling like a sine wave which has the amplitude, wavelength of that given EM wave.)
2. As EM wave is generated when current changes, does this mean all AC current carrying wires in our day-to-day life radiate EM waves?
3. Radio antenna: As current needs to flow to create magnetic fields which generates electric field and hence EM wave. How does it take place in antenna as it does not seem to be closed loop to be able to carry current?
Please try to explain in simplest terms possible. Even though i know definitions of technical terms i fail to relate them to real world phenomena.
So a website link to video or animation would be very helpful to clear my confusion.
Thanks
1. Wavelength: As wavelength is distance between two peaks, how can we measure this distance in cm, meter etc. as physically there are no peaks (Earlier my impression was EM wave is a physical invisible line in air traveling like a sine wave which has the amplitude, wavelength of that given EM wave.)
2. As EM wave is generated when current changes, does this mean all AC current carrying wires in our day-to-day life radiate EM waves?
3. Radio antenna: As current needs to flow to create magnetic fields which generates electric field and hence EM wave. How does it take place in antenna as it does not seem to be closed loop to be able to carry current?
Please try to explain in simplest terms possible. Even though i know definitions of technical terms i fail to relate them to real world phenomena.
So a website link to video or animation would be very helpful to clear my confusion.
Thanks