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Below are the previews for the slide in Topic 5 - Light and the EM Spectrum. If you click on them, you can see larger versions. If you are on a computer you can press the left and right arrows to move. You can also click the arrows to the left and right of the screen.

Powerpoint Description:

This slideshow covers: reflection, refraction of waves through a glass block, finding the critical angle, uses of total internal reflection, specular vs diffuse reflection, using filters, seeing coloured objects in different colours of light, converging and diverging lenses, power and focal length of lenses, speed of electromagnetic waves, the electromagnetic spectrum, facts and wavelengths of different colours of visible light, what happens when waves hit a boundary, refraction at a boundary, radiation from objects, temperature compared to the colour of an object, balancing the temperature of a body using radiation coming in and out, the temperature of the Earth and what it depends on, uses and dangers of different parts of the electromagnetic spectrum, using radio waves, changing atoms through ionisation.

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