Photoelectric Effect, The

Synopsis: Explains the photoelectric effect and tells the story of its discovery, investigation and eventual explanation by Einstein, which brought about the revolutionary notion that light is a stream of photons, and the development of quantum mechanics.

The video deals in turn with the following topics: Hertz’s discovery of the photoelectric effect whilse investigating electromagnetic radiation; the wave-nature of light - how light sources form interference patterns which suggests that light must travel in waves; Lenard’s investigations of the photoelectric effect and his discovery that increasing light frequency rather than light intensity increased the maximum kinetic energy of electrons, which caused problems with the wave theory of light; Einstein, Planck and the ‘ultraviolet catastrophe’ - how black body radiation theory disagreed with experiemental data until Planck worked out his concept of energy quanta (E = hf); Einstein’s explanation of the photoelectric effect - all light (EMR) consists of energy quanta called photons, the maximum kinetic energy of photons depends on light frequency and electron escape energy (W), calculations of cut-off potential and work function; applicatons of the photoelectric effect - photo-sensors, light meters, solar cells, etc.
Language: English
Country: Australia
Year of release: 2004
Year of production: 2003
Uses: A-level students
Subjects: Physics
Keywords: light; photoelectric cells; photons

Name: Video Education Australasia c/o ClickView
Email: info@clickview.com.au
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Address: Suite 125, Jones Bay Wharf
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NSW 2009
Australia
Notes: UK agents: Boulton Hawker. VEA owned by ClickView.

Name: Boulton-Hawker Films Ltd
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Web: http://www.boultonhawker.co.uk/ External site opens in new window
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Notes: Distributor of over 400 DVDs and videos for use in teaching at GCSE level and above. Particularly strong in science-based subjects which the company used to produce themselves, but now sources from the USA, Canada and Australasia. Titles cover the subject areas of biology, business studies, careers, chemistry, child development & the family, citizenship, design & technology/food technology, English, geography/ecology, home economics, ICT, maths, media studies, PE/sport studies, physics and PSHE. Sale with free preview.

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