Use this ray box on a whiteboard to vividly demonstrate optical principles.

• Produce rays using an incandescent lamp rather than LED or laser
• Attach ray projector to veritcal surface using suction cups
• Great for use on non-magnetic surfaces

This projector provides up to five well collimated light beams that trace clear optical paths along a chalkboard. The fixed central beam establishes the optical axis. The other rays may be adjusted to desired angles to demonstrate spherical aberration.