When a certain photosensitive surface is illuminated with monochromatic light of frequency v, the stopping potential for the photocurrent is \( - \frac{{{V_0}}}{2}.\) When the surface is illuminated by monochromatic light of frequency \(\frac{v}{2},\;\)the stopping potential is -V0 photoelectric emission is

• A. \(\frac{4}{3}{\rm{v}}\)
• B. 2v
• C. \({\rm{\;}}\frac{{3{\rm{v}}}}{2}\)
• D. \({\rm{\;}}\frac{{5{\rm{v}}}}{3}\)