find threshold frequency, when light of wavelength 400nm falls on a metal electrons emerge from the surface of the metal but when wavelength of incident light is decreased to 320 nm electrons move with certain speed.

Question

shamim · Answer

the required formula will b$$c=f _{0}\lambda _{0}$$

shamim · Answer

$$f _{0}=\frac{ c }{ \lambda _{0} }$$

shamim · Answer

another formula u need $$hf=hf _{0}+\frac{ 1 }{ 2 }mv _{m}^{2}$$

shamim · Answer

u hv to find out the value of  $$v _{m}$$