Electromagnetic Spectrum
... • X-rays have enough energy to damage human cells which is why lead vests are worn. • The visible part of the spectrum is the only part that can be seen with the human eye. However, other animals can see parts of the spectrum that humans can’t. For example, a large number of insects can see ultravio ...
... • X-rays have enough energy to damage human cells which is why lead vests are worn. • The visible part of the spectrum is the only part that can be seen with the human eye. However, other animals can see parts of the spectrum that humans can’t. For example, a large number of insects can see ultravio ...
Nov 2009 - Vicphysics
... 2. PE effect expt supports particle model (1). Max KE of electrons was independent of intensity (1). For increased intensity, particle model predicted more electrons with same energy, while wave model predicted electrons with more energy (1). [ /3, %]. (Additional results of the PE effect exp’t that ...
... 2. PE effect expt supports particle model (1). Max KE of electrons was independent of intensity (1). For increased intensity, particle model predicted more electrons with same energy, while wave model predicted electrons with more energy (1). [ /3, %]. (Additional results of the PE effect exp’t that ...
Chapter 40 Problems
... 25. A 0.880-MeV photon is scattered by a free electron initially at rest such that the scattering angle of the scattered electron is equal to that of the scattered photon (θ = φ in Fig. 40.13b). (a) Determine the angles θ and φ. (b) Determine the energy and momentum of the scattered photon. (c) Dete ...
... 25. A 0.880-MeV photon is scattered by a free electron initially at rest such that the scattering angle of the scattered electron is equal to that of the scattered photon (θ = φ in Fig. 40.13b). (a) Determine the angles θ and φ. (b) Determine the energy and momentum of the scattered photon. (c) Dete ...
Photoelectric Effect and Einstein`s hypothesis
... so that they can escape from the surface of the material. Electromagnetic radiation acts on electrons within metals, increasing their total energy. Because electrons in metals are weakly bound, you would expect that light would give electrons enough extra kinetic energy to allow them to escape from ...
... so that they can escape from the surface of the material. Electromagnetic radiation acts on electrons within metals, increasing their total energy. Because electrons in metals are weakly bound, you would expect that light would give electrons enough extra kinetic energy to allow them to escape from ...
PDF
... Linear optical quantum computation (LOQC) has recently attracted great interests following the suggestion [1] that a scalable quantum computer based on linear optical components is possible. It has also been known that linear optical systems could achieve non-scalable quantum computation by encoding ...
... Linear optical quantum computation (LOQC) has recently attracted great interests following the suggestion [1] that a scalable quantum computer based on linear optical components is possible. It has also been known that linear optical systems could achieve non-scalable quantum computation by encoding ...
How does light travel?
... Electrodynamics of Moving Bodies", in which he something similar in his own time). In Young's advanced one of his most famous theories and version of the experiment, he used a slip of paper overturned centuries of accepted notions and with slits cut into it, and then pointed a light source orthodoxi ...
... Electrodynamics of Moving Bodies", in which he something similar in his own time). In Young's advanced one of his most famous theories and version of the experiment, he used a slip of paper overturned centuries of accepted notions and with slits cut into it, and then pointed a light source orthodoxi ...
Atomic-absorption (AA) spectroscopy
... The electric potential ionizes rare gas atoms and accelerates them into the cathode where they sputter metal atoms into the gas phase Collisions with gas atoms or electrons excite the metal atoms On decay the metal atoms emit light ...
... The electric potential ionizes rare gas atoms and accelerates them into the cathode where they sputter metal atoms into the gas phase Collisions with gas atoms or electrons excite the metal atoms On decay the metal atoms emit light ...
1 - PLK Vicwood KT Chong Sixth Form College
... be ejected with greater speeds when the radiation intensity increases but observation (2) gives a different result. Obervation (3) : According to wave theory, radiation energy is spread over the wavefront and the amount incident on anyone electron would be extremely small. So for any frequency of ra ...
... be ejected with greater speeds when the radiation intensity increases but observation (2) gives a different result. Obervation (3) : According to wave theory, radiation energy is spread over the wavefront and the amount incident on anyone electron would be extremely small. So for any frequency of ra ...
AP Physics Multiple Choice Practice – Magnetism and
... quantized can be interpreted in which of the following ways? (A) An integral number of electron wavelengths must fit into the electron's circular orbit. (B) Only one electron can exist in each possible electron state. (C) An electron has a spin of 1/2. (D) The atom is composed of a small, positively ...
... quantized can be interpreted in which of the following ways? (A) An integral number of electron wavelengths must fit into the electron's circular orbit. (B) Only one electron can exist in each possible electron state. (C) An electron has a spin of 1/2. (D) The atom is composed of a small, positively ...
Presentation
... We demonstrate the experimental realization of Bohr -like atoms by applying a pulsed unidirectional field, termed a half-cycle pulse (HCP), to atoms in quasi-two-dimensional nearcircular states. This leads to creation of localized wave packets that travel in near-circular orbits and mimic the dynami ...
... We demonstrate the experimental realization of Bohr -like atoms by applying a pulsed unidirectional field, termed a half-cycle pulse (HCP), to atoms in quasi-two-dimensional nearcircular states. This leads to creation of localized wave packets that travel in near-circular orbits and mimic the dynami ...
Ch. 6 Electric Structure HW
... 5C) Describe a particle like characteristic of an electron. (Hint: Think back to Ch. 2) 5D) According to De Broglie’s Theory, why would an electron show more wave-like properties than a golf ball? 5E) Describe how the wave properties of the electron were demonstrated experimentally after De Broglie’ ...
... 5C) Describe a particle like characteristic of an electron. (Hint: Think back to Ch. 2) 5D) According to De Broglie’s Theory, why would an electron show more wave-like properties than a golf ball? 5E) Describe how the wave properties of the electron were demonstrated experimentally after De Broglie’ ...
Quantum Mechanics - Haldia Institute of Technology
... Modern physics in the form of quantum mechanics originated in early 20th century from an apparent collapse of classical deterministic physics related with the phenomena both connected to light as electromagnetic waves described by Maxwell's equations: Ultra-violet catastrophe of blackbody radiatio ...
... Modern physics in the form of quantum mechanics originated in early 20th century from an apparent collapse of classical deterministic physics related with the phenomena both connected to light as electromagnetic waves described by Maxwell's equations: Ultra-violet catastrophe of blackbody radiatio ...
Manipulating and Measuring the Quantum State of Photons and Atoms
... (2) Both density matrices and superoperators we measure typically are very sparse... a lot of time is wasted measuring coherences between populations which are zero. (a) If aiming for constant errors, can save time by making a rough msmt of a given rate first and then deciding how long to acquire da ...
... (2) Both density matrices and superoperators we measure typically are very sparse... a lot of time is wasted measuring coherences between populations which are zero. (a) If aiming for constant errors, can save time by making a rough msmt of a given rate first and then deciding how long to acquire da ...
PHOTONS AND PHOTON STATISTICS
... classical particles. By contrast, they are indistinguishable, nonlocalizable and obey Bose statistics. A figure like Fig. 3 is dangerous as it pretends that photons in a light beam have well defined positions. The notion of classical and quantum particles is intrinsically very different. In particul ...
... classical particles. By contrast, they are indistinguishable, nonlocalizable and obey Bose statistics. A figure like Fig. 3 is dangerous as it pretends that photons in a light beam have well defined positions. The notion of classical and quantum particles is intrinsically very different. In particul ...
Models of Light Student Worksheet
... glucose which moves to wherever glucose is being used. The tracer emits a positron (the antimatter equivalent of an electron) which annihilates when it meets an electron. The mass of the particles is turned into the energy of two photons. These move off in opposite directions to conserve momentum. T ...
... glucose which moves to wherever glucose is being used. The tracer emits a positron (the antimatter equivalent of an electron) which annihilates when it meets an electron. The mass of the particles is turned into the energy of two photons. These move off in opposite directions to conserve momentum. T ...
3.6 The Feynman-rules for QED For any given action (Lagrangian
... and denotes the center-of-mass energy squared. In the limit of massless particles and energies are equal to . The total cross section all momenta is obtained by integrating over the solid angle ...
... and denotes the center-of-mass energy squared. In the limit of massless particles and energies are equal to . The total cross section all momenta is obtained by integrating over the solid angle ...
Quantum Beat of Two Single Photons
... et al. first demonstrated this phenomenon with photon pairs from parametric down-conversion [1], and Santori et al. used the same effect to show the indistinguishability of independently generated photons that are successively emitted from a quantum dot embedded in a microcavity [2]. In all experime ...
... et al. first demonstrated this phenomenon with photon pairs from parametric down-conversion [1], and Santori et al. used the same effect to show the indistinguishability of independently generated photons that are successively emitted from a quantum dot embedded in a microcavity [2]. In all experime ...
File - Mr. C at Hamilton
... of electricity and magnetism in four equations. • This mathematical achievement demonstrated that electric and magnetic forces are really two aspects of the same phenomenon, which we now call electromagnetism. ...
... of electricity and magnetism in four equations. • This mathematical achievement demonstrated that electric and magnetic forces are really two aspects of the same phenomenon, which we now call electromagnetism. ...
Problem 1 : Energy of backscattered photon Compton Scattering
... precisely. To measure it, we will use a Compton polarimeter. Compton scattering is used by the polarimeter to determine polarization. If the electron has its spin angular momentum in the same direction as its momentum, ,it will have a greater Compton scattering probability. The Compton effect is the ...
... precisely. To measure it, we will use a Compton polarimeter. Compton scattering is used by the polarimeter to determine polarization. If the electron has its spin angular momentum in the same direction as its momentum, ,it will have a greater Compton scattering probability. The Compton effect is the ...
Electromagnetic Radiation Magnetism, and Electrostatics
... 22. Which of the following statements best describes the relationship between frequency, wavelength, and energy? a. as energy increases, both wavelength and frequency increase b. as energy increases, both wavelength and frequency decrease c. as energy increases, wavelength increases and frequency de ...
... 22. Which of the following statements best describes the relationship between frequency, wavelength, and energy? a. as energy increases, both wavelength and frequency increase b. as energy increases, both wavelength and frequency decrease c. as energy increases, wavelength increases and frequency de ...
Management of the Angular Momentum of Light: Preparation of
... diverse as biosciences [4] and micromechanics [5]. The angular momentum of light can also be used to encode quantum information that is carried by the corresponding photon states [6]. In this regard, exploitation of the orbital contribution to the angular momentum opens the door to the generation an ...
... diverse as biosciences [4] and micromechanics [5]. The angular momentum of light can also be used to encode quantum information that is carried by the corresponding photon states [6]. In this regard, exploitation of the orbital contribution to the angular momentum opens the door to the generation an ...
ONE HUNDRED YEARS OF LIGHT QUANTA
... we have had light quanta on earth for eons, in fact ever since the good Lord said “let there be quantum electrodynamics” – which is a modern translation, of course, from the biblical Aramaic. So in this talk I’ll try to tell you what quantum optics is about, but there will hardly be enough time to t ...
... we have had light quanta on earth for eons, in fact ever since the good Lord said “let there be quantum electrodynamics” – which is a modern translation, of course, from the biblical Aramaic. So in this talk I’ll try to tell you what quantum optics is about, but there will hardly be enough time to t ...
Photon
A photon is an elementary particle, the quantum of light and all other forms of electromagnetic radiation. It is the force carrier for the electromagnetic force, even when static via virtual photons. The effects of this force are easily observable at the microscopic and at the macroscopic level, because the photon has zero rest mass; this allows long distance interactions. Like all elementary particles, photons are currently best explained by quantum mechanics and exhibit wave–particle duality, exhibiting properties of waves and of particles. For example, a single photon may be refracted by a lens or exhibit wave interference with itself, but also act as a particle giving a definite result when its position is measured. Waves and quanta, being two observable aspects of a single phenomenon cannot have their true nature described in terms of any mechanical model. A representation of this dual property of light, which assumes certain points on the wave front to be the seat of the energy is also impossible. Thus, the quanta in a light wave cannot be spatially localized. Some defined physical parameters of a photon are listed. The modern photon concept was developed gradually by Albert Einstein in the first years of the 20th century to explain experimental observations that did not fit the classical wave model of light. In particular, the photon model accounted for the frequency dependence of light's energy, and explained the ability of matter and radiation to be in thermal equilibrium. It also accounted for anomalous observations, including the properties of black-body radiation, that other physicists, most notably Max Planck, had sought to explain using semiclassical models, in which light is still described by Maxwell's equations, but the material objects that emit and absorb light do so in amounts of energy that are quantized (i.e., they change energy only by certain particular discrete amounts and cannot change energy in any arbitrary way). Although these semiclassical models contributed to the development of quantum mechanics, many further experiments starting with Compton scattering of single photons by electrons, first observed in 1923, validated Einstein's hypothesis that light itself is quantized. In 1926 the optical physicist Frithiof Wolfers and the chemist Gilbert N. Lewis coined the name photon for these particles, and after 1927, when Arthur H. Compton won the Nobel Prize for his scattering studies, most scientists accepted the validity that quanta of light have an independent existence, and the term photon for light quanta was accepted.In the Standard Model of particle physics, photons and other elementary particles are described as a necessary consequence of physical laws having a certain symmetry at every point in spacetime. The intrinsic properties of particles, such as charge, mass and spin, are determined by the properties of this gauge symmetry.The photon concept has led to momentous advances in experimental and theoretical physics, such as lasers, Bose–Einstein condensation, quantum field theory, and the probabilistic interpretation of quantum mechanics. It has been applied to photochemistry, high-resolution microscopy, and measurements of molecular distances. Recently, photons have been studied as elements of quantum computers and for applications in optical imaging and optical communication such as quantum cryptography.