A beam of parallel rays in air (n = 1.0) propagating to the right is refracted upon entering and leaving another medium. Both the position of the source and the angle of the source can be adjusted by click-dragging the circular hotspots. Angles may also be measured by click- dragging away from the hotspots.
(a) A light source emits a beam as shown in the simulation. What is the index of refraction of the substance? You can click-drag both the position and the ray-angle for this source. Start
(b) Click-drag the light source into the region of higher index of refraction. Adjust the angle of the source in order to demonstrate total internal reflection. What is the critical angle?
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