Lecture 11
... Each photon carries very little energy. However, even an ordinary torch beam is a torrent of ~1017 photons.s-1. When we “see” light what we observe by eye or on film is the average energy per unit area per time arriving at some surface. ...
... Each photon carries very little energy. However, even an ordinary torch beam is a torrent of ~1017 photons.s-1. When we “see” light what we observe by eye or on film is the average energy per unit area per time arriving at some surface. ...
Ch. 13 Worksheet blank
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投影片 1
... 3. For a single particle, it is described by a wavefunction, (r , t ) which describe the probability to find a particle at position r at time t is P(r , t ) | (r , t ) |2 4. The wavefunction follows the Schrodinger equation: ...
... 3. For a single particle, it is described by a wavefunction, (r , t ) which describe the probability to find a particle at position r at time t is P(r , t ) | (r , t ) |2 4. The wavefunction follows the Schrodinger equation: ...
Formulas and constants Mass of electron m = 9.1. 10 kg
... Formulas and constants Mass of electron me = 9.1. 10 -31 kg Charge on electron = 1.6.10-19 C Planck’s Constant h= 6.626. 10-34 J.s =4.136. 10-15 eV.s h = h / 2! = 1.055.10 "34 J.s = 6.582.10 "16 eV.s ...
... Formulas and constants Mass of electron me = 9.1. 10 -31 kg Charge on electron = 1.6.10-19 C Planck’s Constant h= 6.626. 10-34 J.s =4.136. 10-15 eV.s h = h / 2! = 1.055.10 "34 J.s = 6.582.10 "16 eV.s ...
Light and the Electromagnetic Spectrum
... The Electromagnetic Spectrum The electromagnetic spectrum represents the range of energy from low energy, low frequency radio waves with long wavelengths up to high energy, high frequency gamma waves with small ...
... The Electromagnetic Spectrum The electromagnetic spectrum represents the range of energy from low energy, low frequency radio waves with long wavelengths up to high energy, high frequency gamma waves with small ...
Ch. 5 Notes: Electrons in Atoms Big Idea: The Atoms of each
... i. E quantum = Energy (Joules) ii. h = Planck’s constant = 6.626 x 10 -34 J.s iii. v = frequency (Hertz) b. Energy of radiation increases as the radiation’s frequency increases. 4. According to Planck’s theory, for a given frequency, matter can emit or absorb energy only in whole-number multiples o ...
... i. E quantum = Energy (Joules) ii. h = Planck’s constant = 6.626 x 10 -34 J.s iii. v = frequency (Hertz) b. Energy of radiation increases as the radiation’s frequency increases. 4. According to Planck’s theory, for a given frequency, matter can emit or absorb energy only in whole-number multiples o ...
The Compton Effect
... and waves can behave as particles. to describe the photoelectric effect, light or radiation which are described by a wave model can be considered a particle with a discrete amount of energy ...
... and waves can behave as particles. to describe the photoelectric effect, light or radiation which are described by a wave model can be considered a particle with a discrete amount of energy ...
Atomic Spectroscopy and the Bohr Model
... • Atomic spectroscopy: the study of electromagnetic radiation absorbed and emitted by atoms. • When atoms absorb a specific amount of energy, electrons become excited to a higher energy level, and then relax and emit the energy in the form of light energy (photons). • If we slow down this light usin ...
... • Atomic spectroscopy: the study of electromagnetic radiation absorbed and emitted by atoms. • When atoms absorb a specific amount of energy, electrons become excited to a higher energy level, and then relax and emit the energy in the form of light energy (photons). • If we slow down this light usin ...
PHOTOELECTRIC EFFECT
... A photocell A photocell is usually a vacuum tube with two electrodes. One is a photosensitive cathode which emits electrons when exposed to light and the other is an anode which is maintained at a positive voltage with respect to the cathode. Thus when light shines on the cathode, electrons are attr ...
... A photocell A photocell is usually a vacuum tube with two electrodes. One is a photosensitive cathode which emits electrons when exposed to light and the other is an anode which is maintained at a positive voltage with respect to the cathode. Thus when light shines on the cathode, electrons are attr ...
Unit 4-3 Noteguide Phsyics and Quantem Mechanical
... --EX: Neon Light in a gas tube --each specific frequency of visible light has its own particular color --when we use a prisim, we can see the frequencies of light emitted by an element separate into distinct lines = atomic emission spectrum --each line in the spectrum corresponds to 1 frequency of l ...
... --EX: Neon Light in a gas tube --each specific frequency of visible light has its own particular color --when we use a prisim, we can see the frequencies of light emitted by an element separate into distinct lines = atomic emission spectrum --each line in the spectrum corresponds to 1 frequency of l ...
PE EFFECT - cranson
... Einstein’s Interpretation A new theory of light: • Electromagnetic waves carry discrete energy packets • The energy per packet depends on wavelength, explaining Lenard’s threshold frequency. • More intense light corresponds to more photons, not ...
... Einstein’s Interpretation A new theory of light: • Electromagnetic waves carry discrete energy packets • The energy per packet depends on wavelength, explaining Lenard’s threshold frequency. • More intense light corresponds to more photons, not ...
CHAPTER 3: Light and Telescopes
... Particle Properties of Light Radiating matter emits light in discrete chunks of energy called QUANTA (photon) When atoms are excited they can jump up energy levels- when they move back down they give off photons with energy equal to the amount it needs to loose Energy(photon) = hc/ λ h= (plan ...
... Particle Properties of Light Radiating matter emits light in discrete chunks of energy called QUANTA (photon) When atoms are excited they can jump up energy levels- when they move back down they give off photons with energy equal to the amount it needs to loose Energy(photon) = hc/ λ h= (plan ...
Quantum
... 1905: Einstein explains the photoelectric effect which had been observed decades earlier. When visible light shines on certain metals, electrons are ejected from the surface. The stunning observation was that super bright red light would result in no electrons leaving the surface of the metal, bu ...
... 1905: Einstein explains the photoelectric effect which had been observed decades earlier. When visible light shines on certain metals, electrons are ejected from the surface. The stunning observation was that super bright red light would result in no electrons leaving the surface of the metal, bu ...