The Ray Optics Kit is a versatile kit of components for a wide variety of ray optics experiments. Investigations include:. Linear propagation of light rays,. Focusing of rays by cylindrical lenses,. Focusing of multiple rays showing aberration,. Law of reflection,. Refraction in water,. Prisms. Contents include:. 2 x Lamps and stands. 1 x Pair of housing shields. 2 x Combined single and triple slit plates. 2 x Multiple slit combs. 2 x Holders for combs and slit plates. 4 x Wooden light barriers. 4 x Plano cylindrical lenses + 7D. 2 x Plano cylindrical lenses + 10D. 2 x Plano cylindrical lenses + 17D. 2 x Plano cylindrical lenses - 17D.