Chapter 11.4, Problem 2CP

At what angle would you expect X rays of wavelength 0.154 nm to be reflected from a crystal in which the distance between layers is 312 pm? $\left(\text{Assumen= 1}\text{.}\right)$

$\begin{array}{l}\text{a)}\hfill \\ \text{1}\text{.6°}\hfill \\ \text{b)}\hfill \\ \text{29}\text{.6°}\hfill \\ \text{c)}\hfill \\ \text{0}\text{.25°}\hfill \\ \text{d)}\hfill \\ \text{6}\text{.8°}\hfill \\ \text{e)}\hfill \\ \text{14}\text{.3°}\hfill \\ \hfill \end{array}$