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zelesnik

Pustespiegel (konvex konkav) Spiegel Hohlspiegel Mirror

by zelesnik Jun 20, 2019
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Look nice.. but no idea what you're saying :)

It's a mirror which changes from convex to concave dependent on the pressure which you regulate through the drinking straw.

It is a "mirror" that is convex or concave depending on the airpressure between the films. the airpressure is regulated by blowing or sucking air through the drinking straw. It is a nice experiment for kids to learn how reflektion on concave or convex surface works