Slide 1
... Photoelectric Effect: electrons are ejected from a metal's surface if it is exposed to uv radiation Each metal required a characteristic minimum uv frequency to start ejecting e-s Called Threshold freq, no - As n increases more e-s ejected with higher vel (KE) These data also defied classical physic ...
... Photoelectric Effect: electrons are ejected from a metal's surface if it is exposed to uv radiation Each metal required a characteristic minimum uv frequency to start ejecting e-s Called Threshold freq, no - As n increases more e-s ejected with higher vel (KE) These data also defied classical physic ...
Chapter 5
... the orbitals also have different energies inside energy levels All the electrons can move around. ...
... the orbitals also have different energies inside energy levels All the electrons can move around. ...
Where are the electrons
... infrared and radio waves are also forms of radiation. We divide the spectrum up according to the wavelength of the radiation. ...
... infrared and radio waves are also forms of radiation. We divide the spectrum up according to the wavelength of the radiation. ...
Document
... for electrons in an atom. • The principal quantum number (n) describes the size and energy of the electron orbital. • Sublevels (l) describe the shape of orbitals. The number of sublevels = n • The direction (m) describes orientation of the sublevels. • Spin (s) refers to how an electron ...
... for electrons in an atom. • The principal quantum number (n) describes the size and energy of the electron orbital. • Sublevels (l) describe the shape of orbitals. The number of sublevels = n • The direction (m) describes orientation of the sublevels. • Spin (s) refers to how an electron ...
Approximation Methods
... symmetric about x = a/2 and to go to zero at the walls. - one of the simplest functions with this properties is xn ( a-x)n , where n is a positive integer , consequently , let’s estimate Eo by using : ...
... symmetric about x = a/2 and to go to zero at the walls. - one of the simplest functions with this properties is xn ( a-x)n , where n is a positive integer , consequently , let’s estimate Eo by using : ...
The Quantum Mechanical Model and Electron
... Scientists at the time did not understand why the color of an object changed when ______________ it up (change _____________________). At this time, scientists believed that as energy _______________, the amplitude or _______________ also increased. A. Max Planck _________________ found that the coo ...
... Scientists at the time did not understand why the color of an object changed when ______________ it up (change _____________________). At this time, scientists believed that as energy _______________, the amplitude or _______________ also increased. A. Max Planck _________________ found that the coo ...
Atoms in Latices 1
... Massachusetts achieved BEC in super-cold gas.This feat earned those scientists the 2001 Nobel Prize in physics. ...
... Massachusetts achieved BEC in super-cold gas.This feat earned those scientists the 2001 Nobel Prize in physics. ...
About Heisenberg`s Uncertainty Principle
... obtained precise information about any energy and momentum or about the behaviour in space and time. These two conflicting pictures “pulse- energy” and “space-time” resulting from the interaction of microobject with the appropriate instrumentation complement each other. All microobjects inherent in ...
... obtained precise information about any energy and momentum or about the behaviour in space and time. These two conflicting pictures “pulse- energy” and “space-time” resulting from the interaction of microobject with the appropriate instrumentation complement each other. All microobjects inherent in ...
Vibrational motion
... • Mathematical reason: v cannot take negative values, for if it did the wavefunction would be illbehaved. • Physical reason (same as the particle in a square well): the particle is confined, its position not completely uncertain, and its momentum and kinetic energy cannot be exactly zero. • The zero ...
... • Mathematical reason: v cannot take negative values, for if it did the wavefunction would be illbehaved. • Physical reason (same as the particle in a square well): the particle is confined, its position not completely uncertain, and its momentum and kinetic energy cannot be exactly zero. • The zero ...
Lecture 8 Relevant sections in text: §1.6 Momentum
... infinitesimal generator of translations, viewed as canonical transformations. In the Hamiltonian framework, the conservation of momentum is identified with the statement that the Hamiltonian is translationally invariant, that is, is unchanged by the canonical transformation generated by the momentum ...
... infinitesimal generator of translations, viewed as canonical transformations. In the Hamiltonian framework, the conservation of momentum is identified with the statement that the Hamiltonian is translationally invariant, that is, is unchanged by the canonical transformation generated by the momentum ...
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.