Big Idea: Waves carry information without causing a permanent change on the intervening medium. More info...
Class practical: Making a model microscope and measuring its magnification.
Class practical: Using two convex lenses to make a simple astronomical telescope.
Class practical: Measuring magnification by direct comparison of object and image.
Class practical: Simple demonstration of how the magnifying glass works.
Class practical: Placing the final image at reading distance from the eye, as an astronomer would.
Demonstration: Mimicking the behaviour of short and long sight and its correction.
Demonstration: A flask and lenses are used to show short and long sight and their correction.
Demonstration: Simulating long and short sight using a bowl and lens.
Demonstration: Using a model eye to show the retinal shadow created by an object close to the eye.
Demonstration: A demonstration to show the inversion of an image on the retina, and a model to show how the shadow forms.
Class practical: Estimating the near point and far point for the human eye.
Demonstration: A model eye that demonstrates how accommodation occurs.
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