Answer:
No photoelectric affect will appear.
Explanation:
According to laws of photoelectric effect, every metal has a particular value of work function. This means a minimum amount of energy is required to eject electron from metal surface.
Therefore a minimum frequency of photon (threshold frequency) corresponding to that required amount of minimum energy need to be fall onto metal surface.
If photons have lower frequency than the threshold value then no electron will be ejected and hence no photoelectric effect will appear.
