Accelerating charge emits em waves or pulse

1. Jan 9, 2016

God Plays Dice

Does an accelerating charge, such as one turning a corner emit an em wave or just a pulse? Classical logic dictates it should just be a pulse as there is no oscillation. But which is it?

2. Jan 9, 2016

God Plays Dice

Let me be more specific. An electron in a magnetic field, not synchotron radiation as this is a spiralling electron

3. Jan 9, 2016

4. Jan 9, 2016

God Plays Dice

Sry but I don't understand all those hyroglifics. Just intuitively is a free electron similar to an antenna, where I assume a half wavelength pulse can be created or is it a different case

5. Jan 9, 2016

Staff: Mentor

Then in the future please mark your threads as "B" instead of "I". The math in that link is standard vector calculus from undergraduate level physics.

I have updated this thread for you.

6. Jan 9, 2016

7. Jan 9, 2016

blue_leaf77

Taking the case of wiggler radiation as an analogy to the kind of motion you are considering, a Wiki link (https://en.wikipedia.org/wiki/Wiggler_(synchrotron)) says "A wiggler has a broader spectrum of radiation than an". This suggests that the radiation is indeed confined in time, or is commonly referred as a pulse. By the way, light pulse does not necessarily implies that the pulse length is short enough such that one cycle of the carrier frequency cannot be covered. A pulse is usually described as an oscillation under a localized envelope.