Reflection principle of light
Rectilinear propagation of light
Physical optical reflection teaching tools.
360 degree Rotatable lens, quick detachable, expandable
Colour:black
Material:plastic
Size:29.5 x 4cm
Package Contents:
1 x periscopeOnly the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.