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Student learn basic concepts of chemistry & optics. Ideal for science fair model, science activity at home.It can teach children to explore knowledge, understanding Light concept, Science magic learning , practical guide, many more… Science model | physics Apparatus | lab kit | Tinkering Lab | School-College practical knowledge | Brain Experiments |Science practical class10 ray of light Reflection lightTrusted By Parents, Loved By Children SCIENCE LAST 12 YEAR. Non-Toxic & Safe. Exceeds safety standardsUnique optical kit. Optical Glass slab :(1 )optical rectangular glass slab size: 75 x 50 x 12mm : (2)Prism : 38mm equilateral optical glass triangular prism 38mm x 38mm equilateral (Lens (3)double convex lens diameter: 50-mm focal length: 15-cm( 4) double concave lens diameter: 50-mm focal length: 15-cm optically true [5.] Mirror convex mirror diameter: 50-mm focal length: 15-cm optically true (6)concave mirror diameter: 50-mm focal length: 15-cm optically true [7] Plastic Plain mirror: size: 70mm x40 (8)