Final answer:
The presence of alcohol does not decrease light intensity; this is a false statement. Light intensity is related to the number of photons, which may affect the number of ejected electrons, but not their kinetic energy, which is determined by light frequency.
Step-by-step explanation:
The presence of alcohol does not result in a decrease in light intensity. This statement is False. The question seems to be related to the photoelectric effect, where light causes electrons to be ejected from a material. Light intensity is associated with the number of photons hitting a surface, not their energy level. Although increasing light intensity does raise the number of photons, which could lead to more electrons being ejected, it does not affect the kinetic energy of the ejected electrons. That depends solely on the frequency of the light.
In considering light and its effect on materials, it's critical to differentiate between intensity and frequency. Intensity relates to the brightness or number of photons, while frequency (proportional to energy) determines how much energy each photon carries. It is the frequency of incoming light that, if above a certain threshold, can cause the photoelectric effect and increase the kinetic energy of the electrons ejected.