A nucleus emits a gamma ray of energy 1.0 MeV from a state that has a lifetime of 1.2 ns. What is the uncertainty in the energy of the gamma ray?
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A: Kinetic energy, K = 7.17 eV = 7.17×1.6×10-19 JWavelength, λ = 5.23 x 10^-12 mMass, m = ?
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A: diameter of nucleus (d) = 12.1 fm de broglie wavelength of proton = 12.1 fm
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A: Please refer to the attachments below Thank you Let me know if you have any doubts…
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A: Given :The work function for tungsten (W) is 4.52 eV.wavelength λ = 200 nm
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- Light of wavelength 350 nm falls on a potassium surface, and the photoelectrons have amaximum kinetic energy of 1.3 eV.What is the work function of potassium?The speed of light is 3 × 108 m/s and Planck’sconstant is 6.63 × 10−34 J · s.Answer in units of eV. What is the threshold frequency for potassium?Answer in units of Hz.An electron, starting from rest, accelerates through a potential difference of 26.0 V. What is the final de Broglie wavelength of the electron, assuming that its final speed is not relativistic?In an experiment to study the photo-electric effect, light of wavelength 400 nm shining on a metallic surface causes electrons to be emitted. The maximum kinetic energy of the electrons is 1.05 eV (electron volts). Another light source of wavelength 200 nm is then tried, and the emitted electrons have a maximum kinetic energy of 4.20 eV. Using this information: a) determine the value of Planck's constant. b) determine the work function of the metal.
- What is the wavelength of an electron of energy 2.0 keV ?A particle of matter is moving with a kinetic energy of 7.53 eV. Its de Broglie wavelength is 2.85 x 10^-12 m. What is the mass of the particle?According to this question, what is the threshold frequency and what is the kinetic energy of the ejected electron?
- The de Broglie wavelength of a 60 g golf ball is 4.28x10−34 m. What is its speed?A photon of wavelength 200 nm strikes a metal and ejects an electron with a velocity of 3.4x10^5 m/s. What is the threshold frequency of the metal?A photon with a wavelength of 4.16 nm strikes a surface and emits an electron with kinetic energy of 124.6 eV (electron volts). What is the binding energy of the electron in J?