| 单词 | eV |
| 例句 | “Can it be explained by a sterile neutrino of mass around 1 eV? The answer is no.” Nuclear reactor mystery solved, with no need for new particles 2023-01-11T05:00:00Z An electron accelerated through a potential difference of 1 V is given an energy of 1 eV. College Physics for AP Courses 2015-08-12T00:00:00Z To detect dark sector particles with masses as low as 1/100,000th that of a proton, the material would need to unleash an electron when pinged by a photon of just 0.03 eV. To crack the mystery of dark matter, physicists turn to supersensitive quantum sensors 2022-04-27T04:00:00Z Researchers have long had indirect evidence that the particles should be lighter than 1 eV, but this is the first time that this has been shown in a direct measurement. How Light Is a Neutrino? The Answer Is Closer Than Ever 2022-02-21T05:00:00Z This measurement is a two-fold improvement over previous upper-bound measurements of 2 eV. Physicists close in on elusive neutrino’s mass 2019-09-16T04:00:00Z Reported on 13 September at a meeting in Toyama, Japan, the new result halves the previous limit of 2 eV. Massive, blimplike experiment lowers weight limit on neutrino 2019-09-16T04:00:00Z It follows that an electron accelerated through 50 V is given 50 eV. College Physics for AP Courses 2015-08-12T00:00:00Z By studying the energy of emitted electrons, the authors estimated the energy of the isomeric state to be about 8.28 eV. One tick closer to a nuclear clock 2019-09-10T04:00:00Z These data imply an upper bound of 0.9 eV, which goes down to 0.8 eV when combined with the earlier results. How Light Is a Neutrino? The Answer Is Closer Than Ever 2022-02-21T05:00:00Z Over the next 5 years, the researchers hope to boost their accelerator’s gradient so that it reaches perhaps 10 billion eV over 10 to 20 meters. Much cheaper, smaller atom smashers may be on the horizon 2018-08-29T04:00:00Z So although physicists have studied the phenomenon in detail, they can say only that one of the neutrino types must have a mass of at least 0.05 eV. Weighing the universe's most elusive particle 2017-06-29T04:00:00Z Similarly, an ion with a double positive charge accelerated through 100 V will be given 200 eV of energy. College Physics for AP Courses 2015-08-12T00:00:00Z But, after analyzing the results of a year's worth of data, the researchers found no feature suggesting the existence of sterile neutrinos around 1 eV. Icy telescope throws cold water on sterile neutrino theory 2016-08-07T04:00:00Z The researchers found that the first of these layers, normally called the buffer layer, forms a band gap greater than 0.5 eV, because of the highly periodic way it bonds to the SiC substrate. Graphene Finally Gets an Electronic On/Off Switch 2015-09-30T04:00:00Z For example, the ratio decreases for photon energies less than 2 eV because of ITO absorption in that near-infrared spectral region. [Report] Peak External Photocurrent Quantum Efficiency Exceeding 100% via MEG in a Quantum Dot Solar Cell 2011-12-15T18:55:58.470Z Physicists envision an upgrade to boost the experiment's sensitivity to 0.1 eV. Weighing the universe's most elusive particle 2017-06-29T04:00:00Z For example, about 5 eV of energy is required to break up certain organic molecules. College Physics for AP Courses 2015-08-12T00:00:00Z What is the maximum kinetic energy in eV of electrons ejected from sodium metal by 450-nm EM radiation, given that the binding energy is 2.28 eV? College Physics for AP Courses 2015-08-12T00:00:00Z UV radiation having a wavelength of 120 nm falls on gold metal, to which electrons are bound by 4.82 eV. College Physics for AP Courses 2015-08-12T00:00:00Z If the energy absorbed by a water molecule is 1.0 × 10–5 eV, what is the corresponding wavelength of the microwave photons? College Physics for AP Courses 2015-08-12T00:00:00Z For example, giving 15.0 eV to an electron in the ground state of hydrogen strips it from the atom and leaves it with 1.4 eV of kinetic energy. College Physics for AP Courses 2015-08-12T00:00:00Z In the case of a lead-acid battery, an energy of 2 eV is given to each electron sent to the anode. College Physics for AP Courses 2015-08-12T00:00:00Z The energy needed for a single ionization is a few eV, or less than 10−18 J . College Physics for AP Courses 2015-08-12T00:00:00Z Find the number of neutrinos per cubic meter needed to close the universe if their average mass is 7 eV / c2 and they have negligible kinetic energies. College Physics for AP Courses 2015-08-12T00:00:00Z This 0.4 eV of energy is significant compared with typical atomic energies, which are on the order of an electron volt, or thermal energies, which are typically fractions of an electron volt. College Physics for AP Courses 2015-08-12T00:00:00Z The voltage that stops the electrons from reaching the wire equals the energy in eV. College Physics for AP Courses 2015-08-12T00:00:00Z There are states in water and other molecules that have the same frequency and energy as microwaves, typically about 10–5 eV. College Physics for AP Courses 2015-08-12T00:00:00Z When working with small systems, energy in eV is often useful. College Physics for AP Courses 2015-08-12T00:00:00Z Figure 29.11 The EM spectrum, showing major categories as a function of photon energy in eV, as well as wavelength and frequency. College Physics for AP Courses 2015-08-12T00:00:00Z This is sufficient energy to ionize thousands of atoms and molecules, since only 10 to 1000 eV are needed per ionization. College Physics for AP Courses 2015-08-12T00:00:00Z What is the binding energy in eV of electrons in magnesium, if the longest-wavelength photon that can eject electrons is 337 nm? College Physics for AP Courses 2015-08-12T00:00:00Z To get a further idea of how large the uncertainty in velocity is, we assumed the velocity of the electron was equal to its uncertainty and found this gave a kinetic energy of 95.5 eV. College Physics for AP Courses 2015-08-12T00:00:00Z Calculate the binding energy in eV of electrons in aluminum, if the longest-wavelength photon that can eject them is 304 nm. College Physics for AP Courses 2015-08-12T00:00:00Z Violet light of wavelength 400 nm ejects electrons with a maximum kinetic energy of 0.860 eV from sodium metal. College Physics for AP Courses 2015-08-12T00:00:00Z What is the maximum velocity of electrons ejected from a material by 80-nm photons, if they are bound to the material by 4.73 eV? College Physics for AP Courses 2015-08-12T00:00:00Z The decay energy of a short-lived nuclear excited state has an uncertainty of 2.0 eV due to its short lifetime. College Physics for AP Courses 2015-08-12T00:00:00Z |
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