Timeline for Laser beam focus
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 1, 2021 at 0:55 | comment | added | Paul Childs | Yes. Otherwise any edge would break symmetry. | |
| Mar 31, 2021 at 7:34 | comment | added | Quantumwhisp | Just to understand you right - you talk about a spherical wave solution? The spherical mirror you talk about covers all solid angles around the "focus" point? | |
| Mar 31, 2021 at 0:04 | comment | added | Paul Childs | @Quantumwhisp please tell me then what is the classical solution for ω_0 in my example. | |
| Mar 30, 2021 at 18:53 | comment | added | Quantumwhisp | This answer is wrong. You can't focus light into a single point, even if you try to describe it as a classical wave. There is no classical solution to the wave equation with an abitrary small focus-size. | |
| Mar 15, 2019 at 1:54 | comment | added | Paul Childs | How does that explain why it is incorrect? Uncertainty in location and momentum cause respective spatial and temporal decoherences. These will govern how tightly you can focus light. | |
| Mar 15, 2019 at 1:35 | comment | added | S. McGrew | That answer is not correct. It is possible to cause a single atom in a crystal to emit light, and to know that the atom is localized to within a fraction of a nanometer, but it is not possible to focus the emitted light back to a region the same size. | |
| Mar 14, 2019 at 22:17 | comment | added | Timo_BLN | Thank you, that was the answer I was looking for! | |
| Mar 14, 2019 at 22:17 | vote | accept | Timo_BLN | ||
| Mar 14, 2019 at 22:16 | history | answered | Paul Childs | CC BY-SA 4.0 |