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I am studying transmissions and reception, radio waves, microwaves... I find it difficult to understand that to make it simple, the wave length and frequency of blue light can have a different amplitude. Wave height. How does this work? What difference would there be in the blue light with great amplitude compared to small amplitude?Also some waves are not received under bridges, others are, how does that work?
[Where I could use some help: In electrical circuits, power is proportional to the voltage squared; in a radio transmitter, power is proportional to the voltage squared; in ocean waves, power increases more than linearly with wave height. Is the power of a free-space electromagnetic wave proportional to the square of the electric field strength?]
the wave length and frequency of blue light can have a different amplitude.
Frequency is the inverse of wavelength,
As an experiment, play a single note on a keyboard, that is amplified to be very loud. While maintaining the same note, lower the volume to very low. Does the pitch appear to change like the note is moving away, even though the note has not changed?
What is interesting is, the red shift only impacts the wavelength and frequency, but not the amplitude. A red shift may change the color of the light, but it does not impact the intensity of the new color. This leads to some interesting questions. Since the amplitude is a part of the wave, but does not red shift, what would happen if the amplitude changed suddenly? Would that appear like it is a Doppler shift?
Amplitude. With water waves the amplitude is the height, with sound waves the equivalent is the peak pressure, Radio it's the intensity of the electric and magnetic components. We don't usually refer to amplitude of light, but intensity. That is brightness. You could think number of photons per second, but to really understand you'll have to get to the point of doing the maths of EM waves before this will click properly.Wave can be affected by objects eg water waves by bridges, to create shadows. Water waves can also be refracted, reflected and diffracted just like radio or light waves, also affected by depth of water. This is a whole fascinating subject of its own. Look around for some surf science sites, or how waves on a beach are refracted as the water shallows.So, in the case of EM radiation, The wavelength of the radio wave and size of object will affect how they respond to the object, creating either shadows or interference patterns. One example of this is higher frequency (shorter wavelength) radio waves which can't go beyond the horizon, but lower frequencies (longer wavelengths) can 'bend' over the horizon. Waves can also be reflected off surfaces or atmospheric layers.
What is interesting is, the red shift only impacts the wavelength and frequency, but not the amplitude.
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