3 beam laser box set 2

3 beam laser box set 2 is an excellent teaching aid to teach reflection, refraction and lenses. The set comes with a 3 beam laser box, semi circle plastic block, rectangular plastic block, triangular plastic block, curved mirror, converging lens and diverging lens. There is also a template to measure angle of incidence, angle of reflection, angle of refraction, critical angle, focal length, etc.