4 ms·
Physicists have, in the past, slowed down the group velocity of light. This appears (if the results hold) to be a genuine slowing of the phase velocity, which w
by jballanc 12y ago
Physicists have, in the past, slowed down the group velocity of light. This appears (if the results hold) to be a genuine slowing of the phase velocity, which would be huge. To understand the difference between the two types of velocity, Wikipedia actually has a really good page: http://en.wikipedia.org/wiki/Phase_velocity http://en.wikipedia.org/wiki/Phase_velocity .
- gus_massa 12y agoNo. They only changed the group velocity. There are some very interesting comment in a previous submission from another source: https://news.ycombinator.com/item?id=8909699 https://news.ycombinator.com/item?id=8909699 (58 points, 4 days ago, 10 comments)