Threshold frequency for a certain metal is \( v_{0} \). When light of frequency \( 2 v_{0} \) is....

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Threshold frequency for a certain metal is \( v_{0} \). When
\( \mathrm{P} \)
light of frequency \( 2 v_{0} \) is incident on it, the maximum velocity of photoelectrons is \( 4 \times 10^{8} \mathrm{~cm} \mathrm{~s}^{-1} \). If
W
frequency of incident radiation is increased to \( 5 v_{0} \), then the maximum velocity of photoelectrons, in \( \mathrm{cm} \mathrm{s}^{-1} \), will be
(1) \( (4 / 5) \times 10^{8} \)
(2) \( 2 \times 10^{8} \)
(3) \( 8 \times 10^{8} \)
(4) \( 20 \times 10^{8} \)


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