SCE 18 – Part 1
... • Einstein suggested a measurement that could test his theory. • Philipp Lenard had shown u.v. light can excite certain metals leading to emission of electrons: photoelectric effect. • But no matter how intense the light, electrons are not emitted unless the frequency is sufficiently high – like u.v ...
... • Einstein suggested a measurement that could test his theory. • Philipp Lenard had shown u.v. light can excite certain metals leading to emission of electrons: photoelectric effect. • But no matter how intense the light, electrons are not emitted unless the frequency is sufficiently high – like u.v ...
Section 5-1
... • The wavelength (λ) is the shortest distance between equivalent points on a continuous wave. • The frequency (f) is the number of waves that pass a given point per second. The unit for frequency is 1/sec or sec-1, which is known as a Hertz. • The amplitude is the wave’s height from the origin to a ...
... • The wavelength (λ) is the shortest distance between equivalent points on a continuous wave. • The frequency (f) is the number of waves that pass a given point per second. The unit for frequency is 1/sec or sec-1, which is known as a Hertz. • The amplitude is the wave’s height from the origin to a ...
Quantum Physics - fwiatrowskimbhs
... Waves and Particles We know that light behaves as both a wave and a particle. The rest mass of a photon is zero, and its wavelength can be found from momentum. ...
... Waves and Particles We know that light behaves as both a wave and a particle. The rest mass of a photon is zero, and its wavelength can be found from momentum. ...
Molecular or Stringy Photon, One or Few
... they are using from an advanced geometry and mathematics and they have transferred knowledge of measurement of time and calendar to us and the first clock, i.e. time indicator has been made by them, because the used frequency unit in Planck equation is as cycle on second, it means that electromagnet ...
... they are using from an advanced geometry and mathematics and they have transferred knowledge of measurement of time and calendar to us and the first clock, i.e. time indicator has been made by them, because the used frequency unit in Planck equation is as cycle on second, it means that electromagnet ...
THE CURRENT-VOLTAGE CHARACTERISTICS
... where n is an integer known as a quantum number, f is the frequency of vibration of the molecule, and h is Planck’s constant. The smallest discrete amount of energy radiated or absorbed by a system results from a change in state whereby the quantum number n of the system changes by one. In 1905 Albe ...
... where n is an integer known as a quantum number, f is the frequency of vibration of the molecule, and h is Planck’s constant. The smallest discrete amount of energy radiated or absorbed by a system results from a change in state whereby the quantum number n of the system changes by one. In 1905 Albe ...
Walker3_Lecture_Ch30
... • An ideal blackbody absorbs all light incident on it. The distribution of energy within it as a function of frequency depends only on its temperature. • Frequency of maximum radiation: ...
... • An ideal blackbody absorbs all light incident on it. The distribution of energy within it as a function of frequency depends only on its temperature. • Frequency of maximum radiation: ...
Chapter 9a Introduction to Quantum Mechanics
... Compton scattering cannot be understood on the basis classical electromagnetic theory. On the basis of classical principles, the scattering mechanism is induced by motion of electrons in the material, caused by the incident radiation. This motion must have the same frequency as that of incident wav ...
... Compton scattering cannot be understood on the basis classical electromagnetic theory. On the basis of classical principles, the scattering mechanism is induced by motion of electrons in the material, caused by the incident radiation. This motion must have the same frequency as that of incident wav ...
The Nature of Light
... Kirchhoff’s Laws on Spectra • Law 1- Continuous spectrum: a hot opaque body, such as a perfect blackbody, produce a continuous spectrum – a complete rainbow of colors without any spectral line • Law 2 – emission line spectrum: a hot, transparent gas produces an emission line spectrum – a series of ...
... Kirchhoff’s Laws on Spectra • Law 1- Continuous spectrum: a hot opaque body, such as a perfect blackbody, produce a continuous spectrum – a complete rainbow of colors without any spectral line • Law 2 – emission line spectrum: a hot, transparent gas produces an emission line spectrum – a series of ...
chapter40
... blackbody radiation that leads to an equation for the intensity of the radiation This equation is in complete agreement with experimental observations He assumed the cavity radiation came from atomic oscillations in the cavity walls Planck made two assumptions about the nature of the oscillators in ...
... blackbody radiation that leads to an equation for the intensity of the radiation This equation is in complete agreement with experimental observations He assumed the cavity radiation came from atomic oscillations in the cavity walls Planck made two assumptions about the nature of the oscillators in ...
A. A glowing red object is hotter than a glowing yellow
... A solution was proposed by Max Planck in 1900: The atoms are all radiating, absorbing and redistributing energy between themselves. Each behaves as a harmonic oscillator with discrete modes The distribution of atomic oscillator energies leads to the black-body spectrum The oscillations within atoms ...
... A solution was proposed by Max Planck in 1900: The atoms are all radiating, absorbing and redistributing energy between themselves. Each behaves as a harmonic oscillator with discrete modes The distribution of atomic oscillator energies leads to the black-body spectrum The oscillations within atoms ...
Geometric effects on blackbody radiation
... is greater than its geometrical area; therefore the fact that the emissivity equals the absorptivity actually leads to the opposite conclusion—that we actually do expect a greater emittance than that established by PF. The same reasoning also holds when we examine Han’s [3] analytical proof that Kir ...
... is greater than its geometrical area; therefore the fact that the emissivity equals the absorptivity actually leads to the opposite conclusion—that we actually do expect a greater emittance than that established by PF. The same reasoning also holds when we examine Han’s [3] analytical proof that Kir ...
Ch 16 – Quantam Physics
... The experiment was first carried out by Einstein in 1905. The observations / conclusions : ...
... The experiment was first carried out by Einstein in 1905. The observations / conclusions : ...
laser beam smoothing by optical fiber for improvement of the target
... has been implemented at the Luch laser facility [2] in order to improve the targets irradiation uniformity. The system consists of a broadband master oscillator (MO), smoothing fiber line and preamplifiers. Master oscillator is composed of Nd-glass rod amplifier with lamp pumping and active electro- ...
... has been implemented at the Luch laser facility [2] in order to improve the targets irradiation uniformity. The system consists of a broadband master oscillator (MO), smoothing fiber line and preamplifiers. Master oscillator is composed of Nd-glass rod amplifier with lamp pumping and active electro- ...
Specific Intensity
... carried into a cone in a time interval dt • Specific Intensity (ergs s-1 cm-1 cm-2 sr-1) • Intensity is a measure of brightness – the amount of energy coming per second from a small area of surface towards a particular direction • For a black body radiator, the Planck function gives the specific int ...
... carried into a cone in a time interval dt • Specific Intensity (ergs s-1 cm-1 cm-2 sr-1) • Intensity is a measure of brightness – the amount of energy coming per second from a small area of surface towards a particular direction • For a black body radiator, the Planck function gives the specific int ...
Introduction to Quantum theory, and the
... From both of these we can find the spectral emission (power per unit area per unit wavelength) predicted by Rayleigh and Planck respectively. To find this we multiply c the above expressions by . ...
... From both of these we can find the spectral emission (power per unit area per unit wavelength) predicted by Rayleigh and Planck respectively. To find this we multiply c the above expressions by . ...
Physics and the Quantum Mechanical Model
... Because these particles are extremely small, they are affected by ...
... Because these particles are extremely small, they are affected by ...
CHEM 347 Quantum Chemistry
... Deals with the microscopic at the level of atoms, electrons and smaller. Quantum Mechanics has had a profound effect on our understanding of chemistry. There is a sub-discipline of chemistry and quantum mechanics called ‘quantum chemistry’. e.g. The covalent bond is a result of quantum mechanics and ...
... Deals with the microscopic at the level of atoms, electrons and smaller. Quantum Mechanics has had a profound effect on our understanding of chemistry. There is a sub-discipline of chemistry and quantum mechanics called ‘quantum chemistry’. e.g. The covalent bond is a result of quantum mechanics and ...
Document
... W is the “WORK FUNCTION”, or the amount of energy needed to get the electron out of the metal V is the stopping potential ...
... W is the “WORK FUNCTION”, or the amount of energy needed to get the electron out of the metal V is the stopping potential ...
Slide 1
... E-M radiation was considered to be a wave/energy phenomenon and not matter Max Planck developed a new physics when classical physics could not be used to interpret data from blackbody radiation ( Blackbody is an object that absorbs all radiation incident on it) Blackbody radiation is emitted by sol ...
... E-M radiation was considered to be a wave/energy phenomenon and not matter Max Planck developed a new physics when classical physics could not be used to interpret data from blackbody radiation ( Blackbody is an object that absorbs all radiation incident on it) Blackbody radiation is emitted by sol ...
Section 5-1
... • Contrast continuous electromagnetic spectra and atomic emission spectra. radiation: the rays and particles —alpha particles, beta particles, and gamma rays—that are emitted by radioactive material ...
... • Contrast continuous electromagnetic spectra and atomic emission spectra. radiation: the rays and particles —alpha particles, beta particles, and gamma rays—that are emitted by radioactive material ...
Lecture 33 - Stimulated Absorption
... (stimulated) transitions induced by the radiation field, while the average population of atoms in state 2 is affected by both the downward (spontaneous) emission and downward (stimulated) emission. Why? ii. Therefore, the following equation expresses the equilibrium between the radiation field and t ...
... (stimulated) transitions induced by the radiation field, while the average population of atoms in state 2 is affected by both the downward (spontaneous) emission and downward (stimulated) emission. Why? ii. Therefore, the following equation expresses the equilibrium between the radiation field and t ...
Document
... Electromagnetic energy is a stream of tiny, individual "wave packets" called quanta or photons: ...
... Electromagnetic energy is a stream of tiny, individual "wave packets" called quanta or photons: ...
Irradiance of Electromagnetic Radiation
... Electromagnetic energy is a stream of tiny, individual "wave packets" called quanta or photons: ...
... Electromagnetic energy is a stream of tiny, individual "wave packets" called quanta or photons: ...
Laboratory Exercise: The Electronic Structure of the Hydrogen Atom
... In this laboratory exercise, we will probe the behavior of electrons within atoms using Emission Spectroscopy. In particular, we will focus on the behavior of the electron in the simplest atom, Hydrogen, and this atom's emission spectrum. For comparison, we will look at the emission spectrum of the ...
... In this laboratory exercise, we will probe the behavior of electrons within atoms using Emission Spectroscopy. In particular, we will focus on the behavior of the electron in the simplest atom, Hydrogen, and this atom's emission spectrum. For comparison, we will look at the emission spectrum of the ...
M. Planck, Verhandl. Dtsch. phys. Ges., 2, 202 On an Improvement
... energy distribution law is not as generally valid, as many supposed up to now, but that this law at most has the character of a limiting case, the simple from of which was due only to a restriction to short wave lengths and low temperatures1 . Since I myself even in this Society have expressed the o ...
... energy distribution law is not as generally valid, as many supposed up to now, but that this law at most has the character of a limiting case, the simple from of which was due only to a restriction to short wave lengths and low temperatures1 . Since I myself even in this Society have expressed the o ...