Objective: Investigate refraction of light by various optical components
Light propagates at different speeds in different media. If a medium has low optical depth, the speed of propagation is higher than it would be in a medium of greater optical depth. A change in direction therefore takes place when a beam of light passes through a boundary between two media at any non- zero angle of incidence. The degree of deflection is dependent on the ratio of the refractive indices of these two media, as described by Snell’s law of refraction. This refractive behaviour will now be investigated using optical components made of transparent acrylic (perspex).