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Light Diffraction

Video Overview
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.
Alabama Course of Study

Science (2005)
4th Grade

3.) Recognize how light interacts with transparent, translucent, and opaque materials.
     •  Predicting the reflection or absorption of light by various objects

5th Grade
5.) Contrast ways in which light rays are bent by concave and convex lenses.
      •  Describing how a prism forms a visible spectrum
      •  Explaining why different objects have different colors
      •  Describing how mirrors reflect light
             Example: discussing differences in the reflection of light by convex and concave mirrors
      •  Describing the relationship between the structure of the eye and sight
      •  Identifying types of corrective lenses used to correct different sight problems
             Examples: convex-farsightedness, concave-nearsightedness
      •  Identifying the contribution of van Leeuwenhoek to the development of the microscope

8th Grade
12.) Classify waves as mechanical or electromagnetic.
                  - electromagnetic-ultraviolet light waves, visible light waves
        •  Describing how earthquake waves, sound waves, water waves, and electromagnetic waves
           can be destructive or beneficial due to the transfer of energy
        •  Describing longitudinal and transverse waves
        •  Describing how waves travel through different media
        •  Relating wavelength, frequency, and amplitude to energy
        •  Describing the electromagnetic spectrum in terms of frequencies
             Example: electromagnetic spectrum in increasing frequencies-microwaves, infrared light, visible light, 
             ultraviolet light, X rays


Study Guide

More Episodes OF Einstein Demonstrations

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