# Itoero

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• Birthday 12/12/87

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I take care for the pigeons on the roof.

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2. ## the Ewald–Oseen extinction theorem

In optics, the Ewald–Oseen extinction theorem, sometimes referred to as just "extinction theorem", is a theorem that underlies the common understanding of scattering (including refraction, reflection, and diffraction). An important part of optical physics theory is starting with microscopic physics—the behavior of atoms and electrons—and using it to derive the familiar, macroscopic, laws of optics. https://en.wikipedia.org/wiki/Ewald–Oseen_extinction_theorem https://arxiv.org/abs/1507.05234
3. ## Energy Photon

I thought you were a kind person...So now you don't deny that refraction is just a form of scattering?
4. ## Energy Photon

The interaction light-'gravitational field' is not defined, the interaction light-'particles that form refraction' is defined. There is no point in discussing gravitational lensing in this thread. Again, the interaction light-H2O causes Rayleigh scattering in our atmosphere. When the concentration of H2O rises the scattering causes refraction. Do you deny this? If you deny it, then tell me why.
5. ## Energy Photon

Yes it does. But it's not surprising that you think that. A gravitational force field exist out of quanta. When light interacts with a force field, the photons scatter....this is gravitational scattering. The graviton is an elementary particle that mediates the force of gravitation in the framework of quantum field theory. The existence of a graviton is I think not (sufficiently) proven. But that doesn't matter, refraction (this is not gravitational lensing) reflection, diffraction, doppler effect...are abouut observable wave behavior and have its origins in scatteering. I don't understand why you people can't understand this.
6. ## Light near a gravitational field.

The corona of a black hole is assumed to have relativistic electrons which scatter lower energy photons from the thermal spectrum to a higher energy (increase in frequency).https://en.wikipedia.org/wiki/Compton_scattering#Inverse_Compton_scattering This might imply light gets blueshifted when it approaches a black hole.
7. ## Earth habitability

Probably when there was sufficient O2 in our atmosphere...maybe 2.45 billion years ago but the date is not clear.https://en.wikipedia.org/wiki/Great_Oxygenation_Event
8. ## How photons move?

Why is it not made of energy? Yes but isn't spin a property of energy?
9. ## How photons move?

You can excite an atomic electron to a higher energy state. After a while, they come down to their natural energy state (electrons can't stay excited for long). But, the loss of energy needs to be compensated for by a release of energy, which is done in the form of a photon. How is a photon not just energy? In this example the energy that forms a photon was a property of an electron.
10. ## How photons move?

You can excite an atomic electron to a higher energy state. After a while, they come down to their natural energy state (electrons can't stay excited for long). But, the loss of energy needs to be compensated for by a release of energy, which is done in the form of a photon. The releasing of the energy goes along with an acceleration which forms a photon.
11. ## How photons move?

Then perhaps you should react to what I say. I did not say a photon can be accelerated. A photon is accelerated energy. Something can't have speed if it's not accelerated. Acceleration creates speed. A photon is energy, how is that pop-sci?
12. ## Energy Photon

Get a grip. It was just something I read on another forum and people seem to agree with it,...so I asked it. That's nonsense. You should try to get out of your classical view of things. In quantum physics, force fields (elektromagnetic and gravitational) are made of particles/quanta. You people deny the quantum world in classically described phenomena.
13. ## Energy Photon

In such a lens, you have matter between light source and observer. Light interact with the matter. Wave function collapse states the photons interact with particles of the matter...when photons interact with particles, they scatter.
14. ## Energy Photon

This not just my opinion. Out of papers and discussions I find that the Wikipedia definition is correct. "Scattering is a general physical process where some forms of radiation, such as light, sound, or moving particles, are forced to deviate from a straight trajectory by one or more paths due to localized non-uniformities in the medium through which they pass." Scattering is about wave and particle behavior. Diffraction, refraction and reflection deal only with waves.
15. ## Energy Photon

Yes, diffraction and gravitational lensing are due to scattering of the photons of light. Wave function collapse implies a wave can't change course or travel (unless in vacuum) without the interaction of its quanta with the particles of whatever medium it travels in.When quanta interact with particles they scatter.