The threshold frequency of a metal is $f_0$. When light of frequency $2f_0$ is incident on the metal plate,the maximum velocity of the photoelectrons is $v_1$. When the frequency of the incident radiation is increased to $5f_0$,the maximum velocity of the photoelectrons emitted is $v_2$. The ratio of $v_1$ to $v_2$ is:

  • A
    $v_1/v_2 = 1/2$
  • B
    $v_1/v_2 = 1/8$
  • C
    $v_1/v_2 = 1/16$
  • D
    $v_1/v_2 = 1/4$

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