An interactive physics simulation of light refraction through a rectangular glass slab, built for Class 10 NCERT Science. Adjust the angle of incidence, refractive index, and slab thickness using live sliders and watch the ray diagram update instantly — showing the incident ray bending toward the normal as it enters glass, and away from the normal as it exits. The emergent ray stays parallel to the incident ray, with lateral displacement calculated in real time using d = t · sin(i − r) / cos(r). Includes a Snell's Law verification panel, animated ray propagation, an observation table for recording trials, a five-question quiz, and a bilingual interface switchable between English and हिन्दी.
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