Reflection and Refraction of a Cyan Laser Pointer: an affordable laser pointer with a color that’s uncommon on the market- 488nm producing a beautiful hue of blue. The beam is made brightly visible as internal reflection constrains most of the laser light to propagate along the interior of this block of acrylic (similar to the physics of fiber optics). ➡️ Follow the link in my profile for info on where to get a cyan laser and clear demonstration block like these and other amazing items featured