Task 3: Quantum Theory h = 6.63 × 10-34 Js; c = 3.00 x 108 m/s; me9.11 x 10-31 kg 1. A potassium surface is illuminated by a monochromatic laser light with a wavelength of 400 nm. Determine the maximum speed of a photoelectron emitted from this surface if the potassium surface has a work function of 2.30 eV. me = 9.11 × 10-³¹ kg

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Task 3: Quantum Theory
h = 6.63 × 10-34 J • s;
c = 3.00 × 108 m/s;
m₂ = 9.11 × 10-³1 kg
1. A potassium surface is illuminated by a monochromatic laser light with a wavelength of 400
nm. Determine the maximum speed of a photoelectron emitted from this surface if the
potassium surface has a work function of 2.30 eV. me = 9.11 × 10-³¹ kg
2. A photon has a frequency of 7.50 x 10¹4 Hz,
a. Determine the energy and the momentum of this photon.
b. If all the energy of this photon were to be converted to mass, determine the equivalent
mass for the particle.
c. A microscopic specimen has a wavelength of 8.2 × 10-¹4m and a speed of
1.1 x 105 m/s. Determine the mass of this microscopic specimen.
3. In a TV tube an electric potential difference accelerates electrons from a rest position
towards a screen. Just before reaching the screen, the electrons have a wavelength of
1.2 x 10¹m. Determine the kinetic energy of the electrons just before they reach the
screen. Your final answer should have units of eV.
Transcribed Image Text:Task 3: Quantum Theory h = 6.63 × 10-34 J • s; c = 3.00 × 108 m/s; m₂ = 9.11 × 10-³1 kg 1. A potassium surface is illuminated by a monochromatic laser light with a wavelength of 400 nm. Determine the maximum speed of a photoelectron emitted from this surface if the potassium surface has a work function of 2.30 eV. me = 9.11 × 10-³¹ kg 2. A photon has a frequency of 7.50 x 10¹4 Hz, a. Determine the energy and the momentum of this photon. b. If all the energy of this photon were to be converted to mass, determine the equivalent mass for the particle. c. A microscopic specimen has a wavelength of 8.2 × 10-¹4m and a speed of 1.1 x 105 m/s. Determine the mass of this microscopic specimen. 3. In a TV tube an electric potential difference accelerates electrons from a rest position towards a screen. Just before reaching the screen, the electrons have a wavelength of 1.2 x 10¹m. Determine the kinetic energy of the electrons just before they reach the screen. Your final answer should have units of eV.
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