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    • https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electromagnetics_I_(Ellingson)/01%3A_Preliminary_Concepts/1.02%3A_Electromagnetic_Spectrum
      ectromagnetic fields exist at frequencies from DC (0 Hz) to at least 1020 Hz – that’s at least 20 orders of magnitude! At DC, electromagnetics consists of two distinct disciplines: electrostatics, con...ectromagnetic fields exist at frequencies from DC (0 Hz) to at least 1020 Hz – that’s at least 20 orders of magnitude! At DC, electromagnetics consists of two distinct disciplines: electrostatics, concerned with electric fields; and magnetostatics, concerned with magnetic fields. At higher frequencies, electric and magnetic fields interact to form propagating waves. Waves having frequencies within certain ranges are given names based on how they manifest as physical phenomena.
    • https://phys.libretexts.org/Courses/Berea_College/Electromagnetics_I/01%3A_Preliminary_Concepts/1.02%3A_Electromagnetic_Spectrum
      ectromagnetic fields exist at frequencies from DC (0 Hz) to at least 1020 Hz – that’s at least 20 orders of magnitude! At DC, electromagnetics consists of two distinct disciplines: electrostatics, con...ectromagnetic fields exist at frequencies from DC (0 Hz) to at least 1020 Hz – that’s at least 20 orders of magnitude! At DC, electromagnetics consists of two distinct disciplines: electrostatics, concerned with electric fields; and magnetostatics, concerned with magnetic fields. At higher frequencies, electric and magnetic fields interact to form propagating waves. Waves having frequencies within certain ranges are given names based on how they manifest as physical phenomena.
    • https://phys.libretexts.org/Courses/Joliet_Junior_College/JJC_-_PHYS_110/05%3A_Book-_Physics_(Boundless)/5.08%3A_Waves_and_Vibrations/5.8.06%3A_Wave_Behavior_and_Interaction
      When the medium changes, a wave often experiences partial transmission and partial refection at the interface.
    • https://phys.libretexts.org/Courses/Prince_Georges_Community_College/PHY_2040%3A_General_Physics_III/08%3A_Introduction_to_Quantum_Physics/8.1%3A_History_and_Quantum_Mechanical_Quantities
      Electrons are emitted from matter that is absorbing energy from electromagnetic radiation, resulting in the photoelectric effect.
    • https://phys.libretexts.org/Courses/Muhlenberg_College/MC_%3A_Physics_213_-_Modern_Physics/03%3A_Photons_and_Matter_Waves/3.03%3A_Photoelectric_Effect
      The photoelectric effect occurs when photoelectrons are ejected from a metal surface in response to monochromatic radiation incident on the surface. It has three characteristics: (1) it is instantaneo...The photoelectric effect occurs when photoelectrons are ejected from a metal surface in response to monochromatic radiation incident on the surface. It has three characteristics: (1) it is instantaneous, (2) it occurs only when the radiation is above a cut-off frequency, and (3) kinetic energies of photoelectrons at the surface do not depend of the intensity of radiation. The photoelectric effect cannot be explained by classical theory.
    • https://phys.libretexts.org/Bookshelves/University_Physics/Physics_(Boundless)/29%3A_Atomic_Physics/29.2%3A_The_Early_Atom
      Modern scientific usage denotes the atom as composed of constituent particles: the electron, the proton and the neutron.
    • https://phys.libretexts.org/Courses/Prince_Georges_Community_College/PHY_2040%3A_General_Physics_III/01%3A_Waves_and_Vibrations/1.6%3A_Wave_Behavior_and_Interaction
      When the medium changes, a wave often experiences partial transmission and partial refection at the interface.
    • https://phys.libretexts.org/Courses/Kettering_University/Electricity_and_Magnetism_with_Applications_to_Amateur_Radio_and_Wireless_Technology/01%3A_Preliminary_Concepts/1.04%3A_Electromagnetic_Spectrum
      Electromagnetic fields exist at frequencies from 0 Hz to at least 1020 Hz – that’s at least 20 orders of magnitude! This section describes some of the characteristics of the electromagnetic spe...Electromagnetic fields exist at frequencies from 0 Hz to at least 1020 Hz – that’s at least 20 orders of magnitude! This section describes some of the characteristics of the electromagnetic spectrum, including some of the conventional names given to electromagnetic waves over certain ranges of frequency.
    • https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electromagnetics_and_Applications_(Staelin)/12%3A_Optical_Communications/12.04%3A_Optical_detectors%2C_multiplexers%2C_interferometers%2C_and_switches
      This page covers key photon detectors including phototubes and semiconductor photodiodes, with the latter preferred for efficiency in visible and infrared light. It explains optical communication syst...This page covers key photon detectors including phototubes and semiconductor photodiodes, with the latter preferred for efficiency in visible and infrared light. It explains optical communication systems utilizing wave-division multiplexing and details the workings of multiplexers, demultiplexers, and interferometers like Mach-Zehnder and Michelson.
    • https://phys.libretexts.org/Bookshelves/University_Physics/Physics_(Boundless)/15%3A_Waves_and_Vibrations/15.6%3A_Wave_Behavior_and_Interaction
      When the medium changes, a wave often experiences partial transmission and partial refection at the interface.
    • https://phys.libretexts.org/Bookshelves/Quantum_Mechanics/Introductory_Quantum_Mechanics_(Fitzpatrick)/02%3A_Wave-Particle_Duality/2.05%3A_Photoelectric_Effect
      Incidentally, we can calculate Planck’s constant, and the work function of the metal, by simply plotting the kinetic energy of the emitted photoelectrons as a function of the wave frequency, as shown ...Incidentally, we can calculate Planck’s constant, and the work function of the metal, by simply plotting the kinetic energy of the emitted photoelectrons as a function of the wave frequency, as shown in Figure [f1]. Finally, the number of emitted electrons increases with the intensity of the light because the more intense the light, the larger the flux of light quanta onto the surface.

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