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| Diffraction Grating, Demonstration
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| Nearly 100 times more efficient than an acetate grating, this special diffraction grating can produce a spectrum equivalent to a conventional grating of about 750 lines per millimeter. It can be seen in the ordinary classroom under typical lighting conditions and is sure to provoke animated discussion. For use with overhead projectors. 10 cm x 12.5 cm, mounted between glass to prevent scratching. Plastic filters in four colors (red, yellow, green and blue) show how objects of a certain color appear when bathed in light of another color. |
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