Photons and gravitational field

AI Thread Summary
The gravitational field of one photon can affect the B field of another photon, although the effect is extremely small and beyond current experimental measurement capabilities. Additionally, photons can interact through photon-photon scattering, which involves electron-positron pairs and represents a significantly stronger interaction. This highlights the complex interplay between light and gravity in quantum physics. Understanding these interactions is crucial for advancing theoretical physics. The discussion emphasizes the subtle effects of gravity on photons and their interactions.
cragar
Messages
2,546
Reaction score
3
Can the B field of a photon be affected by the gravitational field of another photon?
 
Science news on Phys.org
Yes, everything is affected by gravity. Allthough in this case, the effect would be exceedingly small, of course. Many orders of magnitude smaller than what is experimentally measurable.

Two photons can also interact via the electron & positron in so-called photon-photon scattering. This would be a much stronger effect.

Torquil
 
Thanks , very interesting
 
Thread 'A quartet of epi-illumination methods'
Well, it took almost 20 years (!!!), but I finally obtained a set of epi-phase microscope objectives (Zeiss). The principles of epi-phase contrast is nearly identical to transillumination phase contrast, but the phase ring is a 1/8 wave retarder rather than a 1/4 wave retarder (because with epi-illumination, the light passes through the ring twice). This method was popular only for a very short period of time before epi-DIC (differential interference contrast) became widely available. So...
I am currently undertaking a research internship where I am modelling the heating of silicon wafers with a 515 nm femtosecond laser. In order to increase the absorption of the laser into the oxide layer on top of the wafer it was suggested we use gold nanoparticles. I was tasked with modelling the optical properties of a 5nm gold nanoparticle, in particular the absorption cross section, using COMSOL Multiphysics. My model seems to be getting correct values for the absorption coefficient and...

Similar threads

Replies
19
Views
1K
Replies
1
Views
950
Replies
12
Views
8K
Replies
1
Views
2K
Replies
31
Views
7K
Replies
5
Views
2K
Back
Top