When a certain photosensitive surface is illuminated with monochromatic light of frequency v,

Question:

When a certain photosensistive surface is illuminated with monochromatic light of frequency $v$, the stopping potential for the photo current is $-\mathrm{V}_{0} / 2$. When the surface is illuminated by monochromatic light of frequency $v / 2$, the stoppoing potential is $-\mathrm{V}_{0}$. The threshold frequency for photoelectric emission is :

  1. (1) $\frac{5 v}{3}$

  2. (2) $\frac{4}{3} v$

  3. (3) $2 v$

  4. (4) None of the above


Correct Option: , 4

Solution:

(4)

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