| Students will love making their own working concave and convex lenses with concentrated gelatin, and the exploration of color mixing and filtering. You can determine the index of refraction of the gelatin by the method of apparent thickness, and the radius of curvature with the spherometer. This opens another way of finding the focal length of the lenses. The kit includes 4 petri dishes, 4 watch glasses, 1 plastic tube, 3 packages of gelatine, 1 spherometer and instruction manual. |