Simuer Crystal Optical Glass Triangular Prism Refractor for Teaching Light Spectrum Physics and Photo Photography Prism,2", 3"

FEATURE: Make a rainbow by refraction easy. Cool science experiment you can do at home. Trying taking pictures with the rainbow. Makes a great gift. SPECIFICATION: 2 Inch Triangular Prism: Color: Clear Prism Length: 2.00 inch / 5 cm Side Length: 1.18 inch / 3cm Weight: 2.73oz/77.5g Material: high-quality K9 crystal 3 Inch Triangular Prism: Color: Clear Prism Length: 3.00 inch/8 cm Side Length: 9.84inch/25 cm Material: high-quality K9 crystal HOW TO CREATE A RAINBOW: Must set at an angle to get rainbow that is very intense. You can use a mirror under the prism to reflect rainbow onto wall and ceiling where you can actually watch the movement of the Sun. PACKAGE INCLUDEDE: 1 * 2" Triple Prism 1 * 3" Triple Prism 1 * Decent Gift Box