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Energy required to remove an electron fr...

Energy required to remove an electron from aluminium surface is 4.3 V. If light of wavelength 2000 Å falls on the surface, the velocity of the fastest electron ejected from the surface will be

A

`8.4 xx 10^(5) m//sec`

B

`7.4 xx 10^(5) m//sec`

C

`6.4 xx 10^(5) m//sec`

D

`8.4 xx 10^(6) m//sec`

Text Solution

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The correct Answer is:
A
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