Concave and Convex Lenses

Author:Tom Walsh

Move the tip of the "Object" arrow to move the object. Move the point named " Focus' " to change the focal length. Move the point named " Focus' " to the right side of the lens to change to a concave lens.

New Resources

Multiplication with Area Models
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רישום חופשי
Multiplying 2-Digit by 2-Digit Numbers Using an Area Model

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Sangaku 15
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Calculus lesson while in 7th grade
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Теорема на Микел

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Quadratic Equations
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