If ultraviolet radiation of 6.2 eV falls of an aluminium surface , then kinetic energy of the fastest emitted electrons is (work function = 4.2 e V)A. `3.2 xx 10^(-19) J`B. `3.2 xx 10^(-21) J`C. `7 xx 10^(-25) J`D. `9 xx 10^(-31) J`

If ultraviolet radiation of 6.2 eV falls of an aluminium surface , the

1.	If ultraviolet radiation of 6.2 eV falls of an aluminium surface , then kinetic energy of the fastest emitted electrons is (work function = 4.2 e V)A. `3.2 xx 10^(-19) J`B. `3.2 xx 10^(-21) J`C. `7 xx 10^(-25) J`D. `9 xx 10^(-31) J`
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If ultraviolet radiation of 6.2 eV falls of an aluminium surface , then kinetic energy of the fastest emitted electrons is (work function = 4.2 e V)A. `3.2 xx 10^(-19) J`B. `3.2 xx 10^(-21) J`C. `7 xx 10^(-25) J`D. `9 xx 10^(-31) J`

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