3 ms·
I thought there might be a way to use constructive and destructive interference of a large number of sources to build an open air 3d hologram out of pure light.
by calhoun137 8y ago
I thought there might be a way to use constructive and destructive interference of a large number of sources to build an open air 3d hologram out of pure light. If light didn't have to travel in a straight line, and we could control the index of refraction at any point in space, this would probably work.
- chopin 8y agoStanding sound waves could achieve this. Albeit, the change in refractive index is small. Another possibility would be using molecules having a high refractive index when exited. A laser tuned to that would probably work. But that's not exactly in air.