I'm a little confused. My source says the dielectric constant for water is 80. Then I have the equation that gives the index of refraction as [itex]n=\sqrt{\epsilon_r}[/itex] (since it isn't very magnetic). But the index of refraction for water is 1.33. What am I missing?(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Dielectric constant and index of refraction

**Physics Forums | Science Articles, Homework Help, Discussion**