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From the scattering of sunlight, Thomson found that the classical radius of the elec- tron is 2.82 1015 m.

From the scattering of sunlight, Thomson found that the classical radius of the elec- tron is 2.82 × 10−15 m. If sunlight with an intensity of 470 W/m2 falls on a disk with this radius, estimate the time required to ac- cumulate 1.0 eV of energy. Assume that light is a classical wave and that the light striking
the disk is completely absorbed. How does your estimate compare with the
observation that photoelectrons are emitted within 10−9s?
Answer in units of s.

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