STEM DIY - Telescopic periscope
Experimental principle: The paper periscope uses two mirrors to make the light reflect into the eye after being reflected twice, so that you can see the underwater world.
Extension size: 26 * 4 * 4CM
[1: Folding periscope] Fold the paper periscope along the edge of the paper, and stick the connection with double-sided adhesive.
[2: put the lens] tear off the film of the two sides of the lens, and fix it on the top and bottom of the paper periscope respectively, insert the long end into the short end.
[3: Experiment] After the production is complete, invite your friends and experiment together. See what's changed in the world seen through the periscope