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Photoelectric emission is observed from ...

Photoelectric emission is observed from a surface for frequencies `v_(1) and v_(2)` of incident radiations
`(v_(1) gt v_(2))`. If the maximum kinetic energy of photoelectrons in the two cases are in the ratio of `2 : 1` then threshold frequency `v_(0)` is given by.

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To solve the problem, we will use the concepts of photoelectric emission and the relationship between the frequency of incident light, the work function, and the kinetic energy of emitted photoelectrons. ### Step-by-Step Solution: 1. **Understanding the Photoelectric Effect**: The photoelectric effect states that when light of sufficient frequency strikes a material, it can eject electrons from that material. The energy of the incident photons is given by \( E = h \nu \), where \( h \) is Planck's constant and \( \nu \) is the frequency of the incident light. 2. **Kinetic Energy of Photoelectrons**: ...
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