Talk:Physics Study Guide/Greek alphabet

The lower case $$\iota\;$$ is rarely used in physics or mathematics because it is so easily confused with the Roman character $$i\;$$ (which is typeset in italics for most mathematics), which is widely used in physics and math. I know that some wikipedia articles claim that iota is occasionally used for the imaginary unit $$\sqrt{-1}\;$$, but that must be very rare, because I've never seen that in my many years of physics graduate school and research. Physicists tend to use $$i\;$$ for $$\sqrt{-1}\;$$, while electrical engineers tend to use $$j\;$$. The lower case $$\iota\;$$ (sometimes with a bar through it, to divide it by $$ 2 \pi\;$$) is used in plasma physics for the "rotational transform", the amount of twist in a magnetic field in toroidal geometry, but this is a specialized usage that does not need to be in this study guide that is aimed at students (like pre-med students) in a trig-based physics course.

--Greg Hammett (discuss • contribs) 01:07, 24 May 2011 (UTC)

At the bottom of the page, there is the phrase 'missionaries of the sacred heart'. Is this supposed to be there?Doug1943 (discuss • contribs) 14:16, 19 September 2017 (UTC)