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MANAGERS AND PROJECTIONISTS
At what speed does the film pass over the camera aperture ? 975
At what distance from the center of the camera picture aperture is the sound accompanying the motion recorded ? 976
How many frames are between the picture frame and the frame on which the sound accompanying that picture frame is recorded ? 976
Describe the effect of the light from the slit, in recording, shining upon the sound track of the film. 979
With what will the photograph shadings of a variable density sound track correspond ? 980
Examining Fig. 383, what do the variations in shadings represent ? 980
Examining Fig. 384, what does the line to the right represent ? 980
What will be the effect of the shadings (Fig. 383) on the main amplifier circuit ? 983
Describe the whole process of recording 983-984-985
What difference is there between "loudness" and "pitch" in sound? 986
In what two ways may photographic "exposure" be varied? 990
What is the time of exposure for each point of the film when recording at the standard speed of 90 feet for film per minute ? 991
The Aeo Lamp
For what is the Aeo lamp used ? 977
Is the Aeo lamp a filament lamp ? 977
Of what various elements does the Aeo lamp consist? 977
With what is the Aeo lamp bulb filled ? 977
Which is the negative and which the positive element
of an Aeo lamp ? 977
With what voltage is the positive and negative elements of an Aeo lamp charged ? 977
By what name other than "Aeo Lamp" is the Aeo
lamp known ? 991
Light Valve Recording
How many methods for recording sound are used in connection with Western Electric equipment? 989
Describe the fundamental principle upon which the light valve depends for its action 989
Describe the construction and operation of a light valve 990
By what kind of current must it be operated? 990
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