Semicylinder
Product Code : SCL-OS-12894
Quick Answer: The Semicylinder is a semicircular transparent optical block for refraction experiments: a ray aimed at the centre of the curved face enters without bending, so refraction at the flat face can be measured.
Last updated: October 2026
Key Features
Semicircular block for refraction and ray tracing Snell’s law, refractive index and critical angle work Shows total internal reflection Used with a ray box or laser ray box and a protractor sheet About This Product
Students place the block on a protractor sheet, send a ray to the centre of the flat face and measure the angles of incidence and refraction to find the refractive index. Increasing the angle until the ray reflects back shows the critical angle and total internal reflection.
Related: Optical Sectional and Blocks Acrylic, Rectangular .
For a quotation on the Semicylinder, contact Educational Instrument .
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