Detailed Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: A form of spectroscopy utilizing X-rays and this effect is complementary to Auger spectroscopy and is used to measure the binding energies of atoms. This effect is combined with secondary emission in a PMT to enhance signal intensity in various forms of spectroscopy. The amount of electromotive force required to prevent this effect from producing a net current is referred to as the stopping potential. The maximum possible (*) kinetic energy attainable by the product of this effect is equal to Planck's constant times the incident photon frequency minus the work function of the material. For 10 points, the 1921 Nobel Prize in Physics was awarded to Albert Einstein for his explanation of what effect, in which an electron is ejected from a material due to light shining on it
A:
Science