Note that if the incident wave has wavelength λ {\displaystyle \lambda } , and it is elastically scattered by an angle of 2 θ {\displaystyle 2\theta } , then q = 4 π sin ⁡ ( θ ) λ {\displaystyle q={\frac {4\pi \sin(\theta )}{\lambda }}} In the context of protein structures, the term B-factor is used.
Perlu dicatat bahwa jika gelombang yang jatuh memiliki panjang gelombang λ {\displaystyle \lambda } , dan ia dihamburkan secara elastis oleh suatu sudut 2 θ {\displaystyle 2\theta } , maka q = 4 π sin ⁡ ( θ ) λ {\displaystyle q={\frac {4\pi \sin(\theta )}{\lambda }}} Dalam konteks struktur protein, digunakan istilah faktor-B.