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Focal Length
Simulations allow students to adjust the position and shape of concave and convex lenses to learn about divergence, conv… full details...
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Finding the Focal Length of a Convex Lens
This demonstrates a simple method to find the focal length of a convex lens using light from a distance object. full details...
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Parallel Beams 1
This activity consolidates teaching that a convex lens causes light rays to converge, and shows how it can be used to pr… full details...
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Refracting Telescope 3 - The whole system
This activity consolidates understanding of the objective and eyepiece lenses, and demonstrates how they work together i… full details...
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Measuring the Focal Length of a Convex Lens
This activity gives practice measuring the focal length of a set of convex lenses, by placing each lens in front of a di… full details...
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Parallel Beams 2
This activity shows that curved reflectors can be used to focus parallel beams to a point, and create parallel beams fro… full details...
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