- #1
BOAS
- 553
- 19
Hello,
I have a question or two that I suppose will include the nature of light and how that links to electromagnetism.
Sitting at my desk doing some work, listening to music over my speakers, I get a text. But I know I'm about to receive the text before my phone vibrates, because my speakers emit a series of buzzing/beeping noises.
So, what's going on here?
I have a few half baked ideas in my head, but it's been a while since I did electromagnetism in school and I don't start studying it at uni until january, so my memory is rather fuzzy on the subject + we never did look at how light is related to electricity and magnetism, though the name 'electromagnetic wave' certainly suggests that it is.
I remember the picture of an EM wave from my textbook that looked like a wave oscillating 'up' and 'down', with another (can't remember if it was phase shifted) moving in the 'left' and 'right' directions. I know the moving a wire through a magnetic field can induce a current, so is there a tiny magnetic field involved with the broadcast of my text message that can induce a current in my speakers?
Or perhaps I have it backwards and my phone is emitting some kind of 'receipt'.
Thanks for any light you can shed on the matter :)
BOAS
I have a question or two that I suppose will include the nature of light and how that links to electromagnetism.
Sitting at my desk doing some work, listening to music over my speakers, I get a text. But I know I'm about to receive the text before my phone vibrates, because my speakers emit a series of buzzing/beeping noises.
So, what's going on here?
I have a few half baked ideas in my head, but it's been a while since I did electromagnetism in school and I don't start studying it at uni until january, so my memory is rather fuzzy on the subject + we never did look at how light is related to electricity and magnetism, though the name 'electromagnetic wave' certainly suggests that it is.
I remember the picture of an EM wave from my textbook that looked like a wave oscillating 'up' and 'down', with another (can't remember if it was phase shifted) moving in the 'left' and 'right' directions. I know the moving a wire through a magnetic field can induce a current, so is there a tiny magnetic field involved with the broadcast of my text message that can induce a current in my speakers?
Or perhaps I have it backwards and my phone is emitting some kind of 'receipt'.
Thanks for any light you can shed on the matter :)
BOAS