Find the frequency of light which ejects electrons from a metal surface fully stopped by a retarding potential of 3V. The photoelectric effect begin in this metal at frequency of \[6\times {{10}^{14}}\] per second.

• A. \[1.32\times {{10}^{15}}Hz\]
• B.        \[3.28\times {{10}^{14}}Hz\]
• C. \[6.22\times {{10}^{15}}Hz\]
• D.        \[2.22\times {{10}^{11}}Hz\]