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The two photons should be identical, so such a device cannot be built.
Quote from: Just thinking on 17/08/2021 19:21:41We will have to manufacture a device that we will call a, new photon created light Spectrum analyzer machine I will leave that part for your very competent self to deliver.The two photons should be identical, so such a device cannot be built.
We will have to manufacture a device that we will call a, new photon created light Spectrum analyzer machine I will leave that part for your very competent self to deliver.
Watch this space...
If the bulb is still and the mirror is moving and you get a doppler shift the light is coming from the mirror.
Light is a wave, no photon, that's just theory.
So, what's the difference between reflection- which changes the wavelength of the waves and creation of a new photon- with a new wavelength?
Quote from: trevorjohnson32 on 17/08/2021 21:53:46Light is a wave, no photon, that's just theory.Ignoring the fact that "just a theory" is not a bad thing when it comes to science...Photons are quite well documented. We can detect them. We know they are there.
what shape is a photon is it like a long french fry?
Light is a wave, no photon, that's just theory. A wave is a denser part of a medium spreading outward to a less dense part of that medium, so light has space-time as its medium, so light is space.
Quote from: Bored chemist on 17/08/2021 21:53:27So, what's the difference between reflection- which changes the wavelength of the waves and creation of a new photon- with a new wavelength?I find the question difficult to understand but I can say this if the mirror is moving towards the doppler detector and we get a blue shift it just means the light is being compressed and the opposite for the redshift. I think the big problem with using a mirror to detect any shift is that the mirror would have to be moving very fast to see any noticeable change in pattern.
Be quiet; the grown ups are talking.
I think the big problem with using a mirror to detect any shift is that the mirror would have to be moving very fast to see any noticeable change in pattern.
Well... radar speed traps work just fine.It's also possible to accelerate a bunch of plasma to a very high speed, and reflect light off it.You get a doppler shift.
I think the speed camera is measuring the change in distance of the moving vehicle over time not the same type of shift.
Quote from: Just thinking on Today at 07:49:18 I think the speed camera is measuring the change in distance of the moving vehicle over time not the same type of shift.https://en.wikipedia.org/wiki/Radar_speed_gun#Doppler_effect
The problem with measuring a return signal whether it is light of a mirror or radar of a target is that whether the return signal is a deflection or a newly created photon is that it will return with the same response either way so nothing can be learned by this method but if so how?
What you learn is that there is no difference.