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1. (a) Describe the photoelectric effect with the aid of a clearly labeled diagram showing an...

1. (a) Describe the photoelectric effect with the aid of a clearly labeled diagram showing an apparatus. (b) Derive an equation from conservation of energy for the stopping potential in terms of the frequency of the incident light and the work function for the material. Define variables used. (c) Describe an observation for the photoelectric effect that can’t be explained using classical physics. (1 mark) (d) The work function for a certain metal is 1.8 eV. What is the stopping potential for ejected electrons when light of wavelength 400 nm shines on the metal? (e) An orbiting satellite can become charged by sunlight via the photoelectric effect. This can affect sensitive electronics, and to minimize this a satellite is coated with platinum, which has a large work function, ? = 5.32 eV. What is the longest wavelength of incident sunlight that can charge the satellite?

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genius_generous answered 2 years ago
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