40. What must be the velocity, in meters per beam of electrons if they are to display a de Broglie wavelength of 850 nm? second, of a
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- 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. +)6. (30 points) Construct the energy level diagram for a singly ionized helium (Z = 2) up to the first six energy levels. Show proper energy in eV for each level. П n Anode Photoelectrons Metal specimen (a) An electron in a helium atom jumps from some initial orbit ni to some final orbit nf. If the photon emitted in the process is capable of ejecting photoelectrons from a metal specimen (work function 7.00 eV), determine nf. = (b) If a minimum stopping potential of Vo = 5.09 V is required to prevent the photoelectrons from hitting the anode, determine the value of ni.(Q1) Light of wavelength 424 nm falls on a metal which has a work function of 2.28 eV. a) How much voltage should be applied to bring the current to zero? b) What is the maximum speed of the emitted electrons? c) What is the de Broglie wavelength of these electrons?
- 3. Light of wavelength 500. nm is incident on a metallic surface. If the stopping potential for the photoelectric effect is 0.450 V, find (a) the maximum kinetic energy of the emitted electrons, (b) the work function, and (c) the cutoff wavelength. 11What is the kinetic energy of an electron in a TEM having a 0.0100-nm wavelength?Needs Complete typed solution with 100 % accuracy. Don't use chat gpt or ai i definitely upvote you.