The formula for the distribution function of the photon statistic (or Planck statistic) is similar to that of the Bose-Einstein statistical distribution function, but not exactly the same. a. What's the difference? b. What is the physical meaning of the difference?
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- What is the de Broglie wavelength of a particle, such as an electron, at rest? O A. Davisson and Germer measured this wavelength in their apparatus and found it to be around 10 10 m. O B. The wavelength would be infinitely small and not measurable. OC. The wavelength would be zero meters. O D. This has no meaning. The de Broglie wavelength only applies to moving particles.According to quantum mechanics all objects have a wavelength related to their momentum. What is the de Broglie wavelength of an electron that has been accelerated from rest through a potential of 2500V? Select one: a. 0.346 angstroms. b. 5.63 x 10-14 m. c. 0.245 angstroms. d. 0.173 angstroms.In a Compton scattering experiment, a photon of energy E is scattered from an electron at rest. After the scattering event occurs, which of the following statements is true? a. The energy of the photon is less than E. b. The frequency of the photon is greater than E/h. c. The momentum of the photon increases. d. The wavelength of the photon is less than hc/E.
- Exposure to a sufficient quantity of ultraviolet light will redden the skin, producing erythema—a sunburn. The amount of exposure necessary to produce this reddening depends on the wavelength. For a 1.0 cm2 patch of skin, 3.7 mJ of ultraviolet light at a wavelength of 254 nm will produce reddening; at 300 nm wavelength, 13 mJ are required.a. What is the photon energy corresponding to each of these wavelengths?b. How many total photons does each of these exposures correspond to?c. Explain why there is a difference in the number of photons needed to provoke a response in the two cases.Calculate the de Broglie wavelength of the following items. m₂ = 9.11 x 10-3¹ kg mp+ = 1.67 x 10-27 kg melephant = 10 tonnes a. an electron travelling at 15 km s-¹? b. an electron with a kinetic energy of 1 eV? c. a proton travelling at 15 km s-¹? d. a proton with a kinetic energy of 1 eV?5.40x106 atoms are excited to an upper energy level at t = 0 s. At the end of 30.0 ns , 90.0% of these atoms have undergone a quantum jump to the ground state. You may want to review (Pages 1198 - 1200). Part A How many photons have been emitted? ΥΠ ΑΣφ ? photons Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B What is the lifetime of the excited state? ην ΑΣφ ? ns Submit Request Answer
- I need some help with the following problem. 1a. What is the maximum number of electrons that can be emitted if a potassium surface of work function 2.40 eV absorbs 5.00 x 10-3 J of radiation at a wavelength of 325 nm? b. What is the kinetic energy and velocity of the electrons emitted?Which of the following statements are true? Choose all that are. a. A photon has kinetic energy. b. Electrons have a wavelength. c. If photon A has a larger momentum than photon B, photon A must be moving faster than photon B. d. For the Photoelectric Effect, light with a frequency above the cutoff frequency will result in no electrons being ejected.A photoelectron is emitted from a barium surface illuminated by light of 6.5 x 10^14 Hz. To. What is the wavelength of light in nm? b. If barium has a work function of 2.48 eV, what is the kinetic energy of the photoelectron in eV?
- Please don't provide handwritten solution ....1. The following graphical data was obtained for the wavefunction of a photon. The wavefunction is of the form Y(x) = Asin (Bx). a. Determine A. b. Determine B. c. Determine the wavelength,2, in meters (assume the x-axis of the graph is distance in meters). d. Determine the linear frequency, v, in s'¹. e. Determine the energy, E, of this photon in J.MY NOTES ASK YOUR TEACHER PRACTICE ANOTH OBINPHYS8 10.P.005. DETAILS Electrons striking the back of a conventional TV screen travel at a speed of about 1.5 x 107 m/s. What is their de Broglie wavelength (in nm)? nm Need Help? Read It DETAILS OBINPHYS8 10.P.008. MY NOTES ASK YOUR TEACHER PRACTICE ANOTH If a proton were traveling the same speed as electrons in a TV picture tube (about 7.7 x 107 m/s), what would its de Broglie wavelength be? The mass of a proton is 1.67 x 10-27 kg. m Need Help? Read It Watch It