Calculate the velocity of ejected electron from the metal surface when light of frequency \[2\times {{10}^{15}}Hz\] fall on the metal surface and the threshold frequency is \[~7\times {{10}^{14}}Hz\] for metal?

Calculate the velocity of ejected electron from the metal surface when

1.	Calculate the velocity of ejected electron from the metal surface when light of frequency \[2\times {{10}^{15}}Hz\] fall on the metal surface and the threshold frequency is \[~7\times {{10}^{14}}Hz\] for metal?
A.	\[~1.37\times {{10}^{6}}\]
B.	\[~1.26\times {{10}^{6}}\]
C.	\[1.45\times {{10}^{7}}\]
D.	\[~1.37 \times {{10}^{7}}\]
Answer» B. \[~1.26\times {{10}^{6}}\]

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Calculate the velocity of ejected electron from the metal surface when light of frequency \[2\times {{10}^{15}}Hz\] fall on the metal surface and the threshold frequency is \[~7\times {{10}^{14}}Hz\] for metal?

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