Einstein Demonstrations- Light Defraction

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This podcast is part of the series: Einstein Demonstrations

Multimedia Details Title: Einstein Demonstrations- Light Defraction
Creator: McWane Science Center
Submitted By: Kathy Fournier, Informal Education Partner, Informal Education Partner

McWane Science Center


This demonstration exhibits light’s wave-like characteristics. This is half of light’s duality; the other half being light’s particle-like characteristics. Using diffraction gratings we can compare the visible parts of atomic spectra for different elements. A diffraction grating consists of a large number of equally spaced parallel slits. These slits bend light differently according to wavelength. Incandescent lights work by heating a solid piece of tungsten wire. This heating of a solid produces a variety of wavelengths, giving an impressive spread of colors when viewed with a diffraction grating. Since the other lamps are single gaseous elements, they emit only a few wavelengths of light, their individual atomic spectra.

Length: 03:36
Content Areas: Science
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