An interactive ray diagram simulator for spherical lenses built for Class 10 physics. Visualize how convex (converging) and concave (diverging) lenses form images using the three standard construction rays. Move the object anywhere along the principal axis and instantly see the image position, nature, and magnification — all calculated using the New Cartesian sign convention and the lens formula 1/v − 1/u = 1/f. Supports bilingual display (English / हिन्दी), multiple object types, and a built-in reference table that highlights the active case from the NCERT textbook.
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