6. Your rich uncle has just given you a very dangerous chemical laser that generates a 20-cm-diameter, 25MW laser beam. He wants to know if you can launch something into orbit with it. a. As a quick check of the idea, you calculate the acceleration of a 20-cm-diameter, 0.10kg, perfectly absorbing pellet. 2 12

6. Your rich uncle has just given you a very dangerous chemical laser that generates a 20-cm-diameter, 25MW laser beam. He wants to know if you can launch something into orbit with it. a. As a quick check of the idea, you calculate the acceleration of a 20-cm-diameter, 0.10kg, perfectly absorbing pellet. 2 12

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A photoelectron is emitted from a barium surface illuminated by light of 6.5 x 10^14 Hz. To. What is the wavelength of light in nm? b. If barium has a work function of 2.48 eV, what is the kinetic energy of the photoelectron in eV?
a. X ray are produced in a tube operating at 20.0 kV strikes a target and Compton- scattered through an angle of 90.0° What is the wavelength shift, AA. b. A beam of protons with have the same energy scatters from atoms that have a spacing of 0.150 nm in the crystal. The m- 2 intensity maximum occurs when the angle is 30.0°. Calculate the kinetic energy (in eV) of each beam.
Q11
5. a) A monochromatic light of wavelength 450 nm is incident on a metal surface in a vacuum tube. i. Calculate the energy of photon. ii. If the maximum wavelength of the light to release the electron iii. Calculate the maximum kinetic energy (in electron volts) of the photoelectron emitted with a light of wavelength 450 nm.
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