Dual Color Laser Pointer, 1 Each

The Dual Color Laser Pointer by United Scientific is a Class 3R pen-style pointer that emits a 532 nm green beam and a 650 nm red beam from one rubberized aluminum housing, with a maximum output of 2 x 5 mW. The green beam reaches 200 m and the red beam 100 m. Physics teachers and teaching labs use it for diffraction, interference, and reflection experiments where comparing two wavelengths side by side makes the result easy to see.