# Exponent + square root + fraction: how to make look nice?

I have the following equation:

$$}e^{i\sqrt{\frac{\omega\mu_0\sigma z}{2}}}$$


It is a fraction within a square root which is part of an exponent.

Any idea how to make this look nice? I have tried \dfrac, \vphantom, etc. but am looking for other ideas. Currently, it looks like this:

• I think this off-topic, but I'd recommend using the \exp{} notation and or / notation (i.e. (ωμ_0σz)/2) – Au101 Dec 4 '15 at 1:03
• \exp(..) may be – Manuel Dec 4 '15 at 1:03
• Also }? – Au101 Dec 4 '15 at 1:06
• } will just generate an error: please show the actual code you are using, preferably as a complete small document from \documentclass to \end{document} – David Carlisle Dec 4 '15 at 1:09

As posted there is an extra } so no real output at all (any output after an error is more or less accidental).

You can use a \strut to raise the subscript a bit (1) but possibly better is to not make the subscript so big by not using the \frac form (2) or not using a superscript on e at all (3).

\documentclass{article}

\usepackage{amsmath}

\begin{document}

$$e\strut^{i\sqrt{\frac{\omega\mu_0\sigma z}{2}}}$$
or
$$e\strut^{i\sqrt{\omega\mu_0\sigma z/2}}$$
or
$$\exp(i(\tfrac{1}{2}\omega\mu_0\sigma z)^{\frac{1}{2}})$$

\end{document}

• here's a place where just slightly bigger parentheses would look nicer. – barbara beeton Dec 4 '15 at 15:09

The usage of \strut before ^ raises the exponent higher and the usage of \mathstrut in the nominator does the root symbol bigger.

$$e\strut^{i\sqrt{\mathstrut \omega \mu_0 \sigma z \over 2}}$$