[Wien] about the energy unit Ry

[Stefaan Cottenier]

> The SI unit of energy is the Joule (J).  There are plenty of web pages
which can do
> conversions for you.

Just to name a very good one:

http://dpmc.unige.ch/gr_giovannini/cb/vuc/converter.html

Its link section takes you to a lot of other convertors, and to unit
definitions:

http://dpmc.unige.ch/gr_giovannini/cb/vuc/links.html

Stefaan