Photo electrons are emitted from a surface with a speed of 7×10 5 ms −1 . If the frequency of the incidence radiation is 8×10 14 Hz, the threshold frequency for the surface is
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In radiation: The photoelectric effect. The photoelectric threshold frequency, symbolized by the Greek letter nu with subscript zero, ν0, is that frequency at which the effect is barely possible; it is given by the ratio of the work function symbolized by the Greek letter psi, ψ, to Planck's constant (ν0 =…
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