Abstract
The author confirmed that more light is required if the observer must search for an object than if he knows where the object is to appear. He is now trying to establish how much more light the search requires.
The author confirmed that more light is required if the observer must search for an object than if he knows where the object is to appear. He is now trying to establish how much more light the search requires.
Illuminating Engineering Research Institute (IERI), 1971, p. 5/8
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