1445 PARK AVENUE, NEW YORK 29, N.Y.

35mm FILMSTRIP

# ATOMIC PHYSICS SERIES
## Part I — The Electron

The purpose of this series is as a teaching aid to supplement the sound motion picture "Atomic Physics," and to present in filmstrip form the facts which the motion picture is concerned. Although much of the films' excellent photography and diagram are shown in these strips, they have been designed so that they can be used independently of the motion picture. Each filmstrip in the series is complete in itself.

### SYNOPSIS OF SERIES

#### Part I. (The Electron)

Introductions; historical discovery leading to the electron. The qualities of the electron. Some industrial uses of the electron.

In addition to serving as an introduction to Atomic Physics, or as material for a lecture or course on the electron, it is suggested that much of this strip might be used to illustrate the subject. "What is electricity?"

A. Thomson's work on Positive Rays, Aiton's Mass Spectrograph

B. X-rays, their production and use

C. Radioactivity

D. Apparatus for detecting and recording sub-atomic emissions

#### Part II. (The Nucleus)

A. Rutherford's Nuclear Theory

B. Atomic Number, Moseley's Mass Spectrograph, Bohr's Atom Models

C. The Neutron

D. X-rays

E. The transmutation of nitrogen with alpha particles to form oxygen and hydrogen.

#### Part III. (Atom Smokers)

A. Voltage Multipliers

B. Linear Accelerators

C. Van de Graaf Generator

D. The Cyclotron

E. The Spectrometer

#### Part IV. (Atom Smokers)

A. Uranium Fission: apparatus, uranium isotopes, the atomic pile, the nuclear bomb, the fission process.

B. Portraits of some outstanding scientists who have made history in atomic discovery.

matically from different angles. The results obtained enable the track of
the ray in space to be worked out completely.

25. (TITLE FRAME): Some properties of electrons of the electron.

27. (TITLE FRAME): Ducherage of electrons from hot elements. The fact that
leaved electrons emit electrons is the basis of the thermionic valve, cathode tube,
and many electronic devices.

28. The hot fluorescence of the bulb shown on the left is giving off electrons, as does any substance when exposed to the right of its light. A steady stream of electrons passes from the electrically heated cathode to the anode.

29. (TITLE FRAME): Cathode Ray Oscillations. The cathode ray stream has also been utilized for following very rapid changes of electric field, which it can do because of its minute mass.

30. Cathode Ray Tube. The beam in the tube shown passes between one pair of parallel plates and then between a second pair. The forces due to the electric fields produced between them are right and left to the beam and to each other. A bright flash is produced when the beam passes over the end of the tube, which is coated with a special fluorescent paint. A displacement of the beam is shown by the change of the cathode stream directed by the electric fields between the parallel plates.

31. Radar. It to the vertical pair of plates we apply an increasing voltage, the input moves steadily in the horizontal line. If now to beam at right angles we apply a voltage pulse of a short duration it moves the distance between two fixed points and causes an upwardick of the track. The signals the radar gives a cause of internal time interval measurement, and the position of the plane of flight for planning and navigation.

32. (TITLE FRAME): The Electron Microscope. The electron microscope has been shown that it is possible to focus beams of electrons by means of a magnifying lens. The electron microscope begins of light. From this fact has been made just as lenses may be used to focus the electron beam. It has been shown that a magnification far greater than the ordinary microscope, by means of its use in the study of very tiny objects, through which the electrons can pass freely. The best results as far obtained by its use in electron microscopy.

33. General view of electron microscope to use. (Magnet. Electron microstructure of influenza virus).

34. (TITLE FRAME): The Photographic Cell. The fact that electrons are given off from substances when they movement from the cathode to the anode. This phenomenon has been證實 largely since the coming of sound films.

35. The photovoltaic cell (shown inset) consists of a glass bulb into which a few falls on the anode and a photosensitive cathode has been sealed. When an electric current is passed per unit time (and the illumination. The diagram shows us in a pin sound track.