F/x 1014 Hz 8.0
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The figure below shows how the frequency f of incident radiation on a metal surface varies with the energy Emax of the emitted photoelectrons.
Calculate values for Planck's constant and the work function of the metal in joules.
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- 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.Barium has a work function of 2.48 eV. Calculate the maximum speed of the ejected photoelectrons when barium is illuminated by a 453 nm source.3:42 .ull 5G Done 2 of 2 John Isner holds the ATP's (Association of Tennis Professionals) official record for the fastest serve at 253 km/h. Calculate the de Broglie wavelength of a tennis ball with the standard weight of 54.6 grams. Give your answer in 1034 m (for example, if your answer is 5.6x1034 m, then enter 5.6). This should give you a good idea of why one cannot expect to observe interference affects using tennis balls rather then, for example, electrons. +)
- For light with a wavelength of 350 nm and with an intensity of /= 10-8 W/m², what is the number of photons/(m²s) in the light beam?In a photoelectric effect experiment, the maximum wavelength of the photons for which electrons are emitted is 342 nm. Calculate the work function of the target, in electronvolts. Maximum wavelength corresponds to when the electrons emitted do not have any kinetic energy.why are only electrons emitted in the photoelectric effect experiment? why are positive ions never emitted?
- No photoelectrons are emitted from tungsten unless the wavelength of incoming light is less than 270 nm. If an experiment requires electrons with a maximum kinetic energy of 2.0 eV, what frequency of light should be used to illuminate the tungsten?You 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 Answer