
"Particles or waves"()
... Think of a car. The faster it moves, the more energy it has. In principle it can have any energy up to the energy corresponding to its top speed. Now imagine that the fuel runs out when the car reaches top speed. It slows down, passing continuously through all possible energies until it comes to a h ...
... Think of a car. The faster it moves, the more energy it has. In principle it can have any energy up to the energy corresponding to its top speed. Now imagine that the fuel runs out when the car reaches top speed. It slows down, passing continuously through all possible energies until it comes to a h ...
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... significant spin-orbit coupling (relativistic effect). Energy also depends on J. • For very heavy atoms, a j-j coupling is needed, where j = l + s for each electron. ...
... significant spin-orbit coupling (relativistic effect). Energy also depends on J. • For very heavy atoms, a j-j coupling is needed, where j = l + s for each electron. ...
179 tut Tunneling - University of Maine Physics Education
... STM consists of a very pointed tip that passes over the surface of a material, but does not touch it. The closer the tip is to the material, the more electrons are measured in the tip. This is a very surprising effect, since previous physics models predicted that they shouldn’t be there! ...
... STM consists of a very pointed tip that passes over the surface of a material, but does not touch it. The closer the tip is to the material, the more electrons are measured in the tip. This is a very surprising effect, since previous physics models predicted that they shouldn’t be there! ...
Chapter 6. Electronic Structure of Atoms.
... important postulates: 1) electrons exist only in discrete energy levels, and 2) energy is involved in moving an electron from one level to another. Energy is absorbed as photons to excite the electron from one level to a higher energy level, and is emitted as photons in dropping to a lower energy le ...
... important postulates: 1) electrons exist only in discrete energy levels, and 2) energy is involved in moving an electron from one level to another. Energy is absorbed as photons to excite the electron from one level to a higher energy level, and is emitted as photons in dropping to a lower energy le ...
em spectrum, wavelength, frequency
... Part 2 - Fill in the blanks 6. _______________ formed a theory to explain the structure of an atom by revising physical theories. 7. As the energy level increases, the amount of energy an electron will possess _______________. 8. Electrons give off energy in finite amounts called _______________ whe ...
... Part 2 - Fill in the blanks 6. _______________ formed a theory to explain the structure of an atom by revising physical theories. 7. As the energy level increases, the amount of energy an electron will possess _______________. 8. Electrons give off energy in finite amounts called _______________ whe ...
Particle in a box

In quantum mechanics, the particle in a box model (also known as the infinite potential well or the infinite square well) describes a particle free to move in a small space surrounded by impenetrable barriers. The model is mainly used as a hypothetical example to illustrate the differences between classical and quantum systems. In classical systems, for example a ball trapped inside a large box, the particle can move at any speed within the box and it is no more likely to be found at one position than another. However, when the well becomes very narrow (on the scale of a few nanometers), quantum effects become important. The particle may only occupy certain positive energy levels. Likewise, it can never have zero energy, meaning that the particle can never ""sit still"". Additionally, it is more likely to be found at certain positions than at others, depending on its energy level. The particle may never be detected at certain positions, known as spatial nodes.The particle in a box model provides one of the very few problems in quantum mechanics which can be solved analytically, without approximations. This means that the observable properties of the particle (such as its energy and position) are related to the mass of the particle and the width of the well by simple mathematical expressions. Due to its simplicity, the model allows insight into quantum effects without the need for complicated mathematics. It is one of the first quantum mechanics problems taught in undergraduate physics courses, and it is commonly used as an approximation for more complicated quantum systems.