When an electromagnetic radiation of wavelength 200nm falls on the surface of a metal, electrons are emitted with a kinetic energy of 2.5 x 105J/mol. What is the work function of the metal? What is the maximum wavelength which can cause the photoemission from this metal?
Answers
Answer:
When an electromagnetic radiation of wavelength 200nm falls on the surface of a metal, electrons are emitted with a kinetic energy of 2.5 x 105J/mol. What is the work function of the metal? What is the maximum wavelength which can cause the photoemission from this metal?
Answer:
When light strikes materials, it can eject electrons from them. This is called the photoelectric effect, meaning that light (photo) produces electricity. One common use of the photoelectric effect is in light meters, such as those that adjust the automatic iris on various types of cameras. In a similar way, another use is in solar cells, as you probably have in your calculator or have seen on a roof top or a roadside sign. These make use of the photoelectric effect to convert light into electricity for running different devices.