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## Homework Statement

https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-xpf1/v/t1.0-9/10980752_10204928958360361_5256945004598578166_n.jpg?oh=7fd9defb14be9a9befa0cf5032def429&oe=55576A2C&__gda__=1431534931_425423ae11039486a001b049726e1b11

## Homework Equations

Charles Kittel's book on Solid State Physics, chapter 2.

## The Attempt at a Solution

In problem 4a, I assumed that when the x-rays hit each atom they will scatter into a spherical wave. Then I calculated the first angle where they give constructive interference, ##2 \theta## using bragg's law.

This is correct, right?

However, in the solutions manual they say that

*"The first reflection to appear will be the one with the shortest reciprocal lattice vector ##G_{hkl}##, or equivalently, the one corresponding to the longest plane distance ##d_{hkl}##."*Why is this statement true? Why does the ##(001## plane give the lowest angle of scattering?