The threshold frequency for a certain metal is `3.3xx10^(14)` Hz. If light of frequency `8.2xx10^(14)` Hz is incident on the metal, predict the cut-of

Question

The threshold frequency for a certain metal is `3.3xx10^(14)` Hz. If light of frequency `8.2xx10^(14)` Hz is incident on the metal, predict the cut-of

The threshold frequency for a certain metal is `3.3xx10^(14)` Hz. If light of frequency `8.2xx10^(14)` Hz is incident on the metal, predict the cut-off voltage for the photoelectric emission.

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Given, `v_(0)=3.3xx10^(14)Hz , v =8.2xx10^(14)Hz , e =1.6xx10^(-19)c, KE = eV_(0)= hv - hv_(0)`
`V_(0)=(h(v-v_(0)))/(e )=(6.63xx10^(-34)xx(8.2-3.3)xx10^(14))/(1.6xx10^(-19))=(6.63xx10^(-34)xx10^(14)xx4.9)/(1.6xx10^(-19)) therefore V_(0) = 2.03 V`.

4 views Answered 2023-02-05 15:29