Questions about electromagnnetic wave: amplitude

[moe darklight]

I'm having a little trouble understanding some of this. Here's a few things I don't understand:

- are wave amplitude and frequency/wavelength correlated, or are they independent of each other? (I understand freq and length are correlated because the speed of light is constant) ... (my guess is that they are independent because i remember reading somewhere that radio signals are transmitted through changes in amplitude, so if the freq of a radio station is always the same then they can't be correlated?)

- (and, if they are independent of each other) does the amplitude of an electromagnetic wave also have an impact on the amount of energy that the wave carries?

 

[cesiumfrog]

Earlier today:

intensity is proportional to the square of the amplitude

 

[ranger]

i remember reading somewhere that radio signals are transmitted through changes in amplitude, so if the freq of a radio station is always the same then they can't be correlated?)

Just to clarify something that may be confusing you. When the amplitude is changed. This is referred to as amplitude modulation or more commonly AM. When the frequency is changed, this is known as frequency modulation or FM. Radio signals can be transmitted by either of these. In AM, the amplitude is independent of the frequency. In FM, the frequency is independent of the amplitude.

 

[Gib Z]

Umm In answer to your question, no there in no direct relation between amplitude and the wavelength.

 

[moe darklight]

Thanks for the help :) . I'll do further reading on my own, i didnt know where to start. :)