Final answer:
Brightness gain is derived from the product of flux gain and minification gain, which depends on the diameters of the input and output phosphors of an image intensifier.
However, with only the size of the input phosphor and the flux gain provided, the question cannot be accurately answered without further information.
Step-by-step explanation:
The question revolves around the concept of brightness gain in an image intensifier, specifically asking for the brightness gain given a 12-inch input phosphor and a flux gain of 100.
The brightness gain can be calculated by multiplying the flux gain by the minification gain, which is the square of the ratio of the diameters of the input to the output phosphors. If the output size is not provided, we cannot calculate the brightness gain with the given information alone.
It's also important to note that without the actual figures for input and output phosphors, offering a numeric answer would not be accurate. Since this vital piece of information (the output phosphor size) is missing, we are unable to provide a definitive answer.
Brightness gain is derived from the product of flux gain and minification gain, which depends on the diameters of the input and output phosphors of an image intensifier.
However, with only the size of the input phosphor and the flux gain provided, the question cannot be accurately answered without further information.