A line laser pointer is what you want if you are going to be exploring angles of reflection and refraction or any other properties of geometrical optics.
This is a standard green laser pointer that can generate either a dot or a line for easy viewing of the beam as it passes from one medium to another (refraction) or as it bounces off the surface of a mirror (reflection). Reduce frustration and see the beam without fog, mist or chalk dust. No mess, no fuss, just a visible beam.
The Line Laser Pointer is the perfect green laser pointer for classroom ray tracing and teaching and learning about geometric optics.
Simply screw on the line generating end cap - made of a durable acrylic cylindrical lens to produce a bright green, highly visible line for teaching and learning about light, lasers and optics. Conduct science of light experiments and science of light demonstrations.