Thershold frequency, `v_(0)` is the minimum frequency which a photon must possess to eject an electron from a metal. It is different for different metals. When a photon of frequency `1.0xx10^(15)s^(-1)` was allowed to hit a metal surface, an electron having `1.988x10^(-19)J` of kinetic energy was emitted. Calculated the threshold frequency of this metal.
equal to 600nm hits the metal surface.

Explanation

To solve the problem, we need to calculate the threshold frequency \( v_0 \) of the metal using the given information. The relationship between the energy of the photon, the threshold frequency, and the kinetic energy of the emitted electron is given by the equation:

\[ E = h v = h v_0 + KE \]

Where:
- \( E \) is the energy of the incoming photon.
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