vertically-aligned set LED, easy and dramatic demonstration of the relationship between the color and wavelength of light, spectral range of each LED can be investigated with spectrometer, or just viewed for comparisons with each other
Double Convex Lens, Highly polished, optically true lens is excellent for physics classroom demonstrations in optics and light refraction, with ground edges, great for physics classrooms, with highest grade, Size: 200 mm focal length, Lens measures 2in diameter, 0.2 weight
Fiber Optics Voice and Data Kit, fiber Optics communications, Transmit your voice or a 1kHz signal through the fiber optic cable to a fiber optic receiver, components: including PC boards; microphone; speaker and fiber optic cable, with Transmitter and receiver
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