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Draw
an arrow on an index card and lean the card against a wall
as shown. Put an empty clear drinking glass 3 to 12 inches
in front of it and fill the glass with water. When you look
through the glass, the arrow will appear to be pointing to
the left.
Explanation
When you
pour water into the glass, the water takes the curved shape
of the glass, creating a lens. This lens bends the rays of light
so that the image you see is reversed. |
