Light of a wavelength 2000 A falls on alumunium surface. In alumunium 4.2 eV are required to remove an electron. What is the kinetic energy of (a) the fastest and (b) the slowest emitted photoelectrons? (c) What is the stopping potential? (d) What is the cutoff wavelength for alumunium? (e) If the intensity of the incident light is 2.0 W/m2, what is the average number of photons per unit time per unit area tat strike the surface?

Question

hba · Answer

$$K _{\max}=eV _{0}$$

hba · Answer

@gerryliyana  Start working :)

anonymous · Answer

yes.., do you have any literature about modern physics? 	  	
I'd like to add a reference

hba · Answer

What ?

anonymous · Answer

do you have an ebook of modern physics???

hba · Answer

Oh Yeah I Used To Have One On My I phone but I don't know where it is now,sorry :(