Monthly Archives: November 2010

Refraction – Snell’s Law (AS and IG)

We know that light is refracted towards the normal when it passes from an optically less to more dense material. Here is a diagram of light passing through a glass block. i is the angle of incidence, r is the … Continue reading

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Shadows tell us that light travels in straight lines. We can draw a ray (or streak) of light as a straight line on  a piece of paper. Can you see what’s wrong with this picture? This is a better shadow … Continue reading

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