Refraction - Penny & Cup

 

 

 

 

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 Code Number :   6A42.40

Disclaimer:

Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

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Condition :   Excellent   
Principle :   Refraction of Light Waves 
Area of Study :  Optics  
Equipment :   Styrofoam cup, penny, water.
Procedure :   Place the cup on the bench with the penny inside and towards one side of the cup.  Look into the cup and slowly back away until the penny is no longer visible.  Without moving your eyes from their position, pour water into the cup and notice that the penny reappears when the cup is full of water.
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   References

Od-4:  Freier and Anderson,  A Demonstration Handbook for Physics.

 

Tik Liem,  "The Reappearing Coin,"  Investigation to Science Inquiry, p. 277.



Mail Questions and Comments to:  Dale Stille