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White light, with frequencies ranging from 4.00 × 1014 Hz
Chapter 30, Problem 32P(choose chapter or problem)
Problem 32P
White light, with frequencies ranging from 4.00 × 1014 Hz to 7.90 × 1014 Hz, is incident on a potassium surface. Given that the work function of potassium is 2.24 eV, find (a) the maximum kinetic energy of electrons ejected from this surface and (b) the range of frequencies for which no electrons are ejected.
Questions & Answers
QUESTION:
Problem 32P
White light, with frequencies ranging from 4.00 × 1014 Hz to 7.90 × 1014 Hz, is incident on a potassium surface. Given that the work function of potassium is 2.24 eV, find (a) the maximum kinetic energy of electrons ejected from this surface and (b) the range of frequencies for which no electrons are ejected.
ANSWER:
Step 1 of 3
a)
Here, we have to find the maximum kinetic energy of electrons from the potassium surface.
Given that,
.
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