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A clean metal surface is irradiated with light of three different wavelengths A₁, A2, and 23. The kinetic energies of
the ejected electrons are as follows: A₁: 2.9 x 10-20 J; 2: approximately zero; 23: 4.2 × 10-19 J. Which light has
the shortest wavelength and which has the longest wavelength?
Sagot :
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