This apparatus is meant for studying diffraction when laser light passes through a diffracting element. The device consists of diode laser and diffracting element conveniently mounted on a solid alumnium rail with two carriages. One carriage holds laser head and the other carriage holds diffracting element like single slits, double slits, etc. which can be replaced as per requirement.

The laser mount is kinematic with two dimensional positioning freedom. This helps to direct laser beam to the required point on the diffracting element. All materials used for the construction of this apparatus are corrosion free. The diffraction pattern is projected on to a screen or wall for performing experiments. This elementary apparatus is simple, economical and is well suited for graduate level physics courses.