What is sin[itex]_{2}[/itex][itex]\theta[/itex]min in regards to XRD

[Qrux]

Hi i have 2$\theta$ and have found sin$_{2}$$\theta$ from that but what does sin$_{2}$$\theta$min refer to?

i attached the graph I'm trying to fill out, the information i have is; the peak list with 2$\theta$ the height of the peak in counts, FWHM Left, d-spacing and the relative intensities of the peaks

anyone know what is meant by sin$_{2}$$\theta$min

 

[HallsofIvy]

First, you are writing it wrong. It is NOT "$sin_2\theta_{min}$", it is $(sin^2(\theta))_{min}$. The important thing is that the "min" is not on the $\theta$, it is on the entire function.

That is, it means the minimum value of $sin^2(\theta)$ over all possible values of $\theta$.