REFRACTION of LIGHT through GLASS and WATER

LIGHT Reflection, Refraction and Total internal Reflection Powerpoints

6 Powerpoints to show clearly how rays of light are reflected from a plane mirror and refracted through a glass block, water and a prism. They also shows how TIR occurs and explains the critical angle. It shows exactly how a virtual image is formed in a plane mirror and explains lateral inversion. It explains how to draw an accurate ray diagram and image. It shows how a ray of light refracts through a parallel sided glass block and through water. Includes normal, angle of incidence and angle of refraction. It also explains why water looks shallower than it really is. It shows how rays refract through a glass prism for monochromatic light and white light and Includes normal, angle of deviation and dispersion. TIR is shown for rays travelling from glass into air and from water into air. It includes critical angle and critical ray. It shows how TIR is used in an optical fibre and illustrates the need for cladding glass. It also shows how to find the critical angle using a semicircular glass block and gives the two conditions necessary for TIR to occur. It shows how 45 degree prisms can be used to turn a light ray through 90 degrees and through 180 degrees. A non-45 degree prism is used to further reinforce the concept of TIR. Rays are drawn in stages to show all the steps in constructing an accurate ray diagram.