$refraction and diffraction$

$refraction and diffraction$ $refraction and diffraction$

The demonstration is done on the optical board. The image in inverted.Ī prism demonstrates the dispersion of white light into a spectrum. As an example, a convergent lens forms a real image of a candle's flame on a screen wall. These lenses can be arranged to show various effects and phenomena. Lenses of different sizes, focal lengths and types are available along with lens supports, optical benches and its accessories. Place a clean white sheet on a flat surface in front of the laser to observe the light patterns. They have frosted ends for interfacing with a light beam from a He-Ne laser. Each bar has the dimensions 10 mm x 20 mm x 230 mm. It consists on one straight and one curved bar made from transparent acrylic. Using a helium-neon laser as a light source, one will actually see how an optical fiber transmits light by total internal reflection. It allows one to observe the path of light through a typical optical fiber. As is rotates, the light transmitted through the optic fiber cables changes colors.

$refraction and diffraction$

The fiber optic set-up is lots of thin fiber optic cables attached to a light source and a rotator. Light is transmitted through the rod and can be seen on the other extremity. The lucite spiral rod has its straight side connected to a light source (pictured below). The beam of light will be trapped on the water 'tunnel' and it will be directed downwards with the stream of water.Īn optical fiber and lucite spiral rod is included in this kit. A laser beam is aligned exactly with this opening such that when the water is allowed to flow, it will show total internal reflection. Other demonstrations areĪ clear plastic cylinder is filled with water and openings where water can flow. The three previously mentioned demonstrations can be used: the Geometrical Optics Blackboard, the Optical Disk, and the Refraction Tank, where a ray of light is reflected internally at the surface between colored water and air. There are many demonstrations for this phenomenon. Various experiments can be performed by rotating the laser/light along the disk. It consists of a semi-cylindrical acrylic strip, fitted on the front and back by semi-circular acrylic plates. The tank is placed in the center of a metal dish with a circular scale marked off in degrees on its edge. This demo is designed to show principles of refraction. This apparatus can be used to demonstrate index of refraction variations, total internal reflection, parallel deviation, prism behavior, etc. All accessories are attached to the board using magnetic handles. They average 5 cm thick and 20 cm high, being highly visible for the whole class. The optic set includes six magnetically-backed templates.Īccessories include concave and convex lenses, prisms, mirrors and geometrical figures. This demonstration uses a Laser Ray Box (Wavelength - 635 nm) that project 5 parallel laser beams onto various flat surfaces.

$refraction and diffraction$

Refraction and diffraction