Refraction through a rectangular block
Lesson 16 / 27
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I can describe what refraction is and draw accurate ray diagrams of refraction.
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Refraction is when waves travel from one transparent medium to another, causing a change in direction.
When waves slow down, they turn towards the normal line (angle of incidence > angle of refraction).
When waves speed up, they turn away from the normal line (angle of incidence < angle of refraction).
Refraction can be investigated using a clear rectangular block, ray box and narrow slit, pencil, paper and a protractor.
The greater the angle of incidence, the greater the angle of refraction.
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