Diffraction pattern produced by laser light passing through a circular aperture. View larger

Physics Demonstrations in Light DVD, Part 2

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Part 2 Covers: Interference/Interferometer, Diffraction and Interference, Thin Film Interference, Diffraction and Interference, and Holography.

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  • 30 minutes

    Physics Demonstrations in Light is a two-part video program which presents a full range of demonstrations in the areas of geometrical optics, physical optics, and the nature of light. The program was developed in an effort to give physics teachers a comprehensive collection of video demonstrations, supplementing the instructor’s live classroom demonstrations. The program was designed to meet the needs of high school physics classes as well as introductory level college physics classes.

    Program Format

    Individual demonstrations are 3 to 4 minutes in length and can be quickly accessed using the program's on-screen indexing system. The indexing system allows the teacher to select a particular demonstration and show it at the appropriate time during a unit on thermal energy. The accompanying teacher’s guide gives additional data, information, and suggestions on using the demonstrations to promote further classroom discussion.

    Demonstration Selection and Filming Techniques

    The selection of demonstrations includes those which are difficult to perform in the classroom and those requiring apparatus not readily accessible to many physics teachers. Detailed observation of the demonstrations is accomplished through use of a filming approach which focuses solely on the apparatus, allowing the teacher to utilize the program in a way which is consistent with his or her personal instructional approach. The voice over narration eliminates the on-screen presenter and allows attention to be directed to the physical behaviour being studied.

    Contents of Part 2:

    Interference of White Light and Laser Light
    Interference/Interferometer: Determination of the Wavelength of Light
    Diffraction and Interference: Double-Slit Interference
    Diffraction and Interference: Single-Slit Diffraction
    Diffraction and Interference: Microwave Diffraction
    Thin Film Interference: Newton’s Rings/Air Wedge with Monochromatic Light
    Diffraction and Interference: Diffraction Patterns Produced by Various Objects
    Holography: The Making of a Hologram.