A stream of electrons is accelerated through mercury vapour, and it is shown that the kinetic energy of the electrons is transferred to the mercury atoms only in discreet packets of energy. The association of the quantum of energy with a line in the spectrum of mercury is established. The experiment retraced in this film was one of the earliest indications of the existence of internal energy states within the atom.
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How to watch
Collection
In ACMI's collection
Credits
Collection metadata
ACMI Identifier
320658
Language
English
Subject categories
Documentary → Documentary films - United States
Education, Instruction, Teaching & Schools → Science - Study and teaching
Educational & Instructional → Educational films
Mathematics, Science & Technology → Atomic structure
Mathematics, Science & Technology → Atoms
Mathematics, Science & Technology → Electrons
Mathematics, Science & Technology → Kinetic energy
Mathematics, Science & Technology → Physics
Mathematics, Science & Technology → Science - Experiments
Mathematics, Science & Technology → Science - Study and teaching
Sound/audio
Sound
Colour
Black and White
Holdings
16mm film; Access Print (Section 1)