Related Clues:

• Light-bending device
• "Gorillas in the ___"
• It breaks light up into rainbow's colours
• Device that breaks light into colours of rainbow
• Transparent 3 sided object that seperates light into colours
• Transparent 3-sided object that separates light into colours
• Three-sided object that separates light into colours
• Triangular piece of glass, optical device
• Triangular, glass optical device
• Triangular piece of glass to deviate a beam
• Glass triangle that separates light into colours
• Glass triangle, separates light into colours
• Triangular shape of glass or quartz, breaks up a beam
• Type of polyhedron
• Think fog or low cloud