Timeline for What is meant by the refractive index for $X$ to $Y$?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 20, 2018 at 7:31 | vote | accept | s.xw | ||
| Feb 19, 2018 at 19:59 | history | edited | freecharly | CC BY-SA 3.0 |
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| Feb 19, 2018 at 19:57 | comment | added | freecharly | @s.xw Of course, when $c_2 \gt c_1$. Even $n_1$ can be smaller than $1$ when the phase velocity $c_1$ in the medium $1$ is larger than the vacuum light velocity $c$. This happens e.g. in the frequency range of x-rays. | |
| Feb 19, 2018 at 19:41 | comment | added | s.xw | Can n21 be a number less than 1? | |
| Feb 19, 2018 at 19:04 | history | answered | freecharly | CC BY-SA 3.0 |