A collection of hydrogen atoms in the ground state is illuminated with ultraviolet light of wavelength 59.0 nm. Find the kinetic energy of the emitted electrons.
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- A photon of wavelength 0.59242 nm strikes a free electron that is initially at rest. The photon is scattered straight backward. What is the speed of the recoil electron after the collision? V = iAn electron is moving with a speed of 3.00 x 10° m/s. What is the speed of a proton that has the same de Broglie wavelength as this electron? O 1.63 km/s O 2.18 km/s O 163 m/s 1.63 m/s O 1.36 km/sA hydrogen atom (mass= 1.672 x 10-27 kg) quantum jumps from the fourth excited state to the first excited state by emitting a photon. What is the kinetic energy (J) of the recoiling atom? 4.81 x 10-27 O 4.31 x 10-28 O 1.14 x 10-28 O 5.56 x 10-28 O 3.17 x 10-28 O 3.56 x 10-28 O 6.05 x 10-28 O 2.52 x 10-28 06.97 x 10.28 O 9.11 × 10-28
- Calculate the de Broglie wavelength of a proton moving at 2.60 x 104 m/s and 1.99 x 108 m/s. (a) 2.60 x 104 m/s m (b) 1.99 x 108 m/sThe wavelength of a red spectral emission line is 670.0 nm. At what kinetic energy (in J) would an electron have that wavelength as its de Broglie wavelength?An isolated atom of certain element emits light of wavelength 529 nm when the atom falls from its sixth excited state into its third excited state. The atom emits a photon of wavelength 422 nm when it drops from its seventh excited state into its third excited state. frind wavelength of the light radiated when the atom makes a transition from its seventh to its sixth excited state, in um. a. 21 b. 2.09 c. 2086.34 d 0.0209 e. 208. 63
- A ball has a mass of 0.0972 kg just before itstrikes the Earth after being dropped from abuilding 22.5 m tall.What is its de Broglie wavelength? The acceleration of gravity is 9.8 m/s2and Planck’sconstant is 6.62607 × 10−34 J · s.Answer in units of m.A photon of wavelength 0.90638 nm strikes a free electron that is initially at rest. The photon is scattered straight backward. What is the speed of the recoil electron after the collision? V = i ! m/sAn electron within the hydrogen atom is excited from n1 to n4. The electron then "falls" back to ni in two steps (n4 -> n2, n2 -> n1). Which of the following statements is true about the light emitted during this process? One photons will be emitted. Two photons will be emitted. O Three photons will be emitted. Four photons will be emitted.
- The de Broglie wavelength of a 60 g golf ball is 4.28x10−34 m. What is its speed?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