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CCEA 1210
Specification experiment — Appendix 4 experiments 16–18 – Snell's law, refractive index and critical angle
Appendix 4 includes verifying Snell's law, determining refractive index, and determining the critical angle using a semicircular glass or perspex block.
Interactive Practical · A-Level Physics
Measuring refractive index
Rotate a ray box around a semicircular block, read refraction angles on the protractor, then find the refractive index from a graph of sin i against sin r and check it against the critical angle.
This simulation supports preparation and data-analysis practice. It does not replace carrying out real practical work.
Matched to your course
CCEA · 1210
Specification experiment · Appendix 4 experiments 16–18 – Snell's law, refractive index and critical angle
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