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 electronsA. `1:2`B. `1:1`C. `1:5`D. `1:4`

Lights of two different frequencies whose photons have energies 1 and

1.	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 electronsA. `1:2`B. `1:1`C. `1:5`D. `1:4`
Answer» Correct Answer - A `v_("max")=sqrt((2)/(m)(KE_("max")))=sqrt((2)/(m)(E_(Ph)-W))` `(v_(1))/(v_(2))=sqrt((1-0.5)/(2.5-0.5))=sqrt((0.5)/(2))=1:2`

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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 electronsA. `1:2`B. `1:1`C. `1:5`D. `1:4`

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