16mm Filmography
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Long Time Intervals

Portrays various methods of measuring long time intervals including the ordinary clock, the movement of the earth about the sun, growth rings of trees, deposition of layers of sedimentary rocks and radioactive decay of uranium with special emphasis on the latter. Indicates the difference between "clocks" which record the number of time intervals measured and those which merely measure time intervals. Shows in some detail how the radioactive "clock" is used to determine the age of rocks on the earth, the age of the earth itself, and the age of the elements from which the earth was formed. Stresses the lack of knowledge concerning the exact nature of time.

Credits

Directed by
Larry Yust
Complete catalog record
Portrays various methods of measuring long time intervals including the ordinary clock, the movement of the earth about the sun, growth rings of trees, deposition of layers of sedimentary rocks and radioactive decay of uranium with special emphasis on the latter. Indicates the difference between "clocks" which record the number of time intervals measured and those which merely measure time intervals. Shows in some detail how the radioactive "clock" is used to determine the age of rocks on the earth, the age of the earth itself, and the age of the elements from which the earth was formed. Stresses the lack of knowledge concerning the exact nature of time. Harrison Brown discusses the significance of long time intervals and describes how radioactive dating arrives at an estimate for the age of the earth. For more info on PSSC, its history, and films, visit http://www.afana.org/psscfilms.htm

More in PSSC Physics Series

  1. Electromagnetic Waves 1957
  2. Long Time Intervals 1959
  3. Measuring Large Distances 1959
  4. Mechanical Energy and Thermal Energy 1959
  5. Simple Waves 1959
  6. Collisions of hard spheres 1960
  7. Conservation of Energy 1960
  8. Energy and Work 1960
  9. Frames of Reference 1960
  10. Free Fall and Projectile Motion 1960
  11. Elastic collisions and stored energy 1961
  12. Random Events (1961) 1961
  13. Sound Waves in Air 1961
  14. Emf - Electromotive Force 1962
  15. Matter Waves 1962
  16. Photoelectric effect 1962
  17. Time Dilation 1962
  18. Moving with the Center of Mass: Kinetic Energy and Momentum 1966
  19. The Ultimate Speed - An Exploration With High Energy Electrons 1966

Related films

Sources

  1. 16mm Filmography (legacy record) — title, year, creator, length, format, color, sound, genre, description, catalog record, video
  2. Wikidata · Q123307942 ↗ — country, credits

Original permalink · Record added 2024-04-22 15:11:21