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Define the term 'work function' of a met...

Define the term 'work function' of a metal. The threshold frequency of a metal is `f_(0)`. When the light of frequency `2f_(0)` is incident on the metal plane, the maximum velocity of electrons is `v_(1)`. When the frequency of the incident is increased to `5f_(0)`, the maximum velocity of electrons emitted is `v_(2)`. find the ratio of `v_(1)` to `v_(2)`.

Text Solution

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The correct Answer is:
`1:2`
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The threshold frequency of a metal is f_0 . When the light of frequency 2f_0 is incident on the metal plate, the maximum velocity of electrons emitted is v_1 . When the frequency of the incident radiation is increased to 5f_0 , the maximum velocity of electrons emitted is v_2 . Find the ratio of v_1 andv_2 .

Threshold frequency of metal is f_(0) . When light of frequency v = 2f_(0) is incident on the metal plate, velocity of electron emitted in V_(1) . When a plate frequency of incident radiation is 5f_(0), V_(2) is velocity of emitted electron, then V_(1):V_(2) is

Knowledge Check

  • When the light of frequency 2 v_(0) (where v_(0) is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is v_(1) . When the frequency of the incident radiation is increased to 5 v_(0) , the maximum velocity of electrons emitted from the same plate is v_(2) . the ratio of v_(1) to v_(2) is

    A
    `4:1`
    B
    `2:1`
    C
    `1:4`
    D
    `1:2`

  • When the light of frequency 2v_(0) (where v_(0) is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is v_(1) . When the frequency of the incident radiation is increased to 5v_(0) , the maximum velocity of electrons emitted from the same plate is v_(2) . The ratio of v_(1) to v_(2) is :

    A
    `4 : 1`
    B
    `1 : 4`
    C
    `1 : 2`
    D
    `2 : 1`

  • The threshold frequency for certain metal is v_0 . When light of frequency 2v_0 is incident on it, the maximum velocity of photoelectrons is 4xx10^(6) ms^(-1) . If the frequency of incident radiation is increaed to 5v_0 , then the maximum velocity of photoelectrons will be

    A
    `(4)/(5)xx10^(6)ms^(-1)`
    B
    `2xx10^(6)ms^(-1)`
    C
    `8xx10^(6)ms^(-1)`
    D
    `2xx10^(7)ms^(-1)`

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