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
Force Board Kit, Compact & Low Maintenance. The Back Board Is Hard-Wearing With A Printed Grid And Is Bench-Standing. Detachable Feet For Easy Storage Ball, Provides The Teacher With A Simple Solution To Demonstrate The Principles Of The Parallelogram And Polygon Of Forces.
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