WATER LENSES
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Children are guided to watch objects through round containers
filled with water or through a drop of water and to explore the relationship
between focal distance and magnifying strength. An empty fish bowl
immerged in a container filled with water acts as a divergent lens.
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CONVERGENT LENS |
DIVERGENT LENS |
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The image of an object viewed through a convergent lens changes, depending on the position of the object referred to the focus of the lens: if the object is between the lens and its focus, it appears enlarged; if the object is beyond the focus, it appears reduced and upside-down. |
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The image of an object situated beyond the focus
of a divergent lens appears smaller then the object. |
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