Q. 12: Photoelectric emission takes place (a). (b) (c) (d) when incident wavelength is greater than threshold wavelength when incident wavelength is less than threshold wavelength when incident frequency is greater than threshold frequency at any frequency
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![Q. 12: Photoelectric emission takes place
(a). when incident wavelength is greater
than threshold wavelength
when incident wavelength is less than
threshold wavelength
(b)
(c)
(d)
when incident frequency is greater than
threshold frequency
at any frequency](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5f34e809-dede-4fbf-8f7c-5aa29412f920%2F3794cb4d-e81b-4408-a347-107dc216cb43%2Ftbrbpnt_processed.jpeg&w=3840&q=75)
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- Photoelectrons with a maximum kinetic energy of 7.95 eV are emitted from a metal when it is illuminated by ultraviolet radiation with a wavelength of 1.25 × 10-7 m. (i) Calculate the energy of the incident photons in electronvolts. (ii) Calculate the wavelength of the radiation (in nanometres) corresponding to the lowest energy photons that can free electrons from the metal. (iii) How do you explain the fact that, when infrared radiation is shone on this metal, no photoelectrons are emitted?In the photoelectric effect, the work function increases if more electrons are emitted. depends only on the metal used. depends on how many photons hit. depends on the frequency of the incident photons. is always larger than the kinetic energy of the emitted electrons.help please
- A monochromatic light source illuminates the surface of metal X. The maximum kinetic energy of electrons leaving the surface of the metal is shown in the graph above.An ammeter is connected to the standard photoelectric effect circuit to measure the photoelectric current arising from the electrons moving between the cathode and anode of the vacuum tube containing the illuminated sample. The current is found to be 12.4mA when the metal is illuminated with a wavelength of 184.2nm.What is the energy (eV) of the photons striking metal X?Photons of wavelength 248.6 nm strike a metal whose work function is 3.5 eV. What is the KE of the most energetic photoelectron? a) 1.5 eV b) 2.5 eV c) 3.5 eV d) none of these.Tantalum has a work function of 4.2 eV. The most energetic photoelectron has KE of 2.12 eV. What is the wavelength of the incoming photons? a) 586 nm b) 197 nm c) 296 nm d) none of these.
- 9. Considering the photoelectric effect; a) If a material has a cutoff wavelength of 780 nm what is the work function of the material? b) What is the maximum speed of liberated electrons when light with a wavelength of 410 nm is used to illuminate the material? If a liberated electron has 3.2349 eV of kinetic energy and it was a photon emitted from a hydrogen atom transition that liberated it, what energy level transition occurred? State both the initial and final energy level.9. Considering the photoelectric effect; a) If a material has a cutoff wavelength of 780 nm what is the work function of the material? b) What is the maximum speed of liberated electrons when light with a wavelength of 410 nm is used to illuminate the material? c) If a liberated electron has 3.2349 eV of kinetic energy and it was a photon emitted from a hydrogen atom transition that liberated it, what energy level transition occurred? State both the initial and final energy level.QUESTION 24 When ultraviolet light with a wavelength of 317 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be 1.76 x 10-1 J. How much energy, in Joule, does an electron have to gain in order to escape from the metal surface? Exponential format with 3 SF.
- A(n) ultraviolet photon has a wavelength of 0.000400 cm. Find the momentum, the frequency, and the energy of the photon in electron volts. (a) the momentum kg. m/s (b) the frequency Hz (c) the energy of the photon in electron volts eVYou set up a photoelectric experiment with an unknown metal to eject electrons. You use light of wavelength λ = 660 nm, which just BARELY ejects electrons from the metal. Planck s constant is either h = 6.63 x 10-34 J.s or h = 4.14 x 10-15 ev.s. a) What is the binding energy of the unknown metal in eV? eV b) You change the light source to one with a wavelength of λ = 300 nm. Using the binding energy you found in the previous step, find the maximum kinetic energy of an electron that is ejected from the metal in Joules. c) What is the stopping voltage for an electron with the kinetic energy you just found? Submit Answer1a) Calculate the de Broglie wavelength of a 0.80 kg ball moving with a constant velocity of 26 m/s (about 60 mi/h). =________m 1b)Calculate the de Broglie wavelength of a 0.62 kg ball moving with a constant velocity of 26 m/s (about 60 mi/h).=_______ m