What is the correct calculation for brightness gain if there are 100 x-ray photons and 5,000 light photons produced?

To determine the brightness gain, we can use the formula that relates the number of output light photons to the number of input x-ray photons. Brightness gain is a measure of how effectively an image intensifier enhances the output light from the input x-rays. The formula to calculate brightness gain is:

Brightness Gain = Output light photons / Input x-ray photons

In this scenario, there are 5,000 light photons produced as an output and 100 x-ray photons as the input. Plugging these values into the formula gives:

Brightness Gain = 5,000 (output) / 100 (input) = 50

It seems there might be a misunderstanding since the correct calculation should yield a simpler ratio rather than the specified answer. The context behind this ratio is that it illustrates the amplification of light as a result of x-rays being intensified. The output in this case significantly exceeds the input, indicating a strong enhancement effect, which is the primary function of image intensifiers.

If we revisit the choices and clarify the calculation presented in the question, it's important to ensure that the values match correctly in a practical sense. The role of the brightness gain is not only to show the ratio but to also let practitioners understand how many more light photons are created