Copy of Concave and Convex Lenses

Autor:Sandeep Bappoo, 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.

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從邊長辨認四邊形
Intercepts in 3D
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Koch Snowflake
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เกมคิดเลขเร็ว
Pythagoras-3d

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Probabilidad Condicional
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