You set up a photoelectric experiment with an unknown metal to eject electrons. You use light of wavelength =530nm, which just barely ejects electrons from the metal. Plank constant is either h=6.63*10^-34J.s or h=4.14*10^-15eV.s. a) what is the binding energy of the unknown metal in eV b)you change the light source to on with a wavelength of 340nm. Using the binding energy you found in the previous step find the maximum kinetic energy of an electron that is ejected from the metal in joules c)what is the stopping voltage of an electron with the kinetic energy you just found
Quantum mechanics and hydrogen atom
Consider an electron of mass m moves with the velocity v in a hydrogen atom. If an electron is at a distance r from the proton, then the potential energy function of the electron can be written as follows:
Isotopes of Hydrogen Atoms
To understand isotopes, it's easiest to learn the simplest system. Hydrogen, the most basic nucleus, has received a great deal of attention. Several of the results seen in more complex nuclei can be seen in hydrogen isotopes. An isotope is a nucleus of the same atomic number (Z) but a different atomic mass number (A). The number of neutrons present in the nucleus varies with respect to the isotope.
Mass of Hydrogen Atom
Hydrogen is one of the most fundamental elements on Earth which is colorless, odorless, and a flammable chemical substance. The representation of hydrogen in the periodic table is H. It is mostly found as a diatomic molecule as water H2O on earth. It is also known to be the lightest element and takes its place on Earth up to 0.14 %. There are three isotopes of hydrogen- protium, deuterium, and tritium. There is a huge abundance of Hydrogen molecules on the earth's surface. The hydrogen isotope tritium has its half-life equal to 12.32 years, through beta decay. In physics, the study of Hydrogen is fundamental.
You set up a photoelectric experiment with an unknown metal to eject electrons. You use light of wavelength =530nm, which just barely ejects electrons from the metal. Plank constant is either h=6.63*10^-34J.s or h=4.14*10^-15eV.s.
a) what is the binding energy of the unknown metal in eV
b)you change the light source to on with a wavelength of 340nm. Using the binding energy you found in the previous step find the maximum kinetic energy of an electron that is ejected from the metal in joules
c)what is the stopping voltage of an electron with the kinetic energy you just found
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