In the Dark

Usually I disapprove of using a wine glass for any purpose other than drinking wine, but here’s a very neat short video by Phil Marshall explaining how you can use a one to simulate a strong gravitational lens such as the system that produced the wonderful Einstein ring recently discovered by Euclid. More specifically it shows how perfect alignment leads to a ring whereas other configurations can produce multiple images or arcs.

If you’re planning to try this at home, please remember to empty your glass beforehand.

This entry was posted on March 7, 2025 at 4:42 pm and is filed under Euclid, The Universe and Stuff with tags Euclid, Phil Marshall, strong gravitational lensing, wine glass. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.