# Bragg's Law Crystal Diffraction

Interactive visualization of Bragg's Law: X-ray diffraction by crystal lattices, demonstrating constructive interference when 2d sinθ = nλ across cubic crystal systems

> Canonical page: https://elysiatools.com/en/visualizations/bragg-diffraction

- **Category:** Physics

## Overview

Interactive visualization of Bragg's Law demonstrating X-ray diffraction by crystal lattices. Bragg condition: 2d sinθ = nλ for constructive interference. Features crystal cross-section showing incident/reflected beams, path difference annotation, and wavefront display. Powder diffraction intensity curve I(θ) with Bragg peaks. Four crystal systems: Simple Cubic (SC), Body-Centered Cubic (BCC) with systematic absences (h+k+l even), Face-Centered Cubic (FCC) with selection rules (h,k,l all odd or all even), and Custom mode. Structure factor F(hkl) determines allowed reflections. Adjustable parameters: incident angle θ, interplanar spacing d, X-ray wavelength λ. Real-time diffraction status: path difference, order n, intensity, phase. Educational content covers Bragg's Law theory, cubic crystal systems with selection rules, and applications (protein crystallography, materials science, drug design, Rosalind Franklin's Photo 51). Multi-language support (zh, en, es, fr, de, ru, pt).

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