Timeline for Are different frequencies of light lensed differently during gravitational lensing a bit like refraction?
Current License: CC BY-SA 3.0
4 events
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| Dec 13, 2022 at 4:57 | comment | added | Luboš Motl | By the equivalence principle, objects in gravitational fields freely move along universal trajectories that do not depend on the mass, just the initial place and speed. On top of that, the total relativistic mass of a photon is positive, proportional to the energy. Only the rest mass is zero. You may say that the gravitational force is small when an object is light but it is also easier to accelerate it because the inertial mass is equally low. | |
| Dec 12, 2022 at 0:03 | comment | added | David Urry | Question based on Lubos Moti's answer: How can photons be massless when they are impacted by gravitational lensing? Gravitational lensing is an impact of the bending of space. But that would imply that dark matter does not travel in space-time. But then it would have to follow some other gravitational law than the bending of space time. | |
| Dec 16, 2012 at 23:41 | comment | added | Eduardo Guerras Valera | Interesting and intriguing remark (+1). That tiny effects possibility is extremely interesting for me. Have you done any back-of-the-envelope order of magnitude estimates for a realistic (although probably rare) scenario? | |
| Dec 16, 2012 at 15:43 | history | answered | Luboš Motl | CC BY-SA 3.0 |