Lights of two different frequencies whose photons have energies 1 and 2.5 eV, respectively, successively illuminate a metal whose work function is 0.5 eV. The ratio of the maximum speeds of the emitted electrons
A
`1 :4`
B
`1:2 `
C
`1:1`
D
`1:5 `
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The correct Answer is:
B
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