Figure 1 The first X-ray diffraction pattern ever recorded. It shows vague smudges rather than sharp spots as in modern pictures, but it is unmistakably the result of diffraction
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The terms in bold link to topics in the AQA, Edexcel, OCR, WJEC and CCEA A-level specifications, as well as the IB, Pre-U and Highers/Advanced Highers exam specifications.
The discovery of X-ray diffraction established the nature of X-rays as electromagnetic radiation and revealed the regular structure of crystals. The results can be understood in terms of path difference and constructive interference.
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