More problems! This time from Lisachem 2008

[Linkage1992]

They say the answer is B, but since the minimum energy required to ejected electrons is half that of the sodium, wouldn't this imply that that the threshold frequency is also half, leading to C?


and for this:



Answers say A is red, B is blue, but because red has a longer wavelength, the fringe spacing would be larger for it, so shouldn't it be the other way around?

[Blakhitman]

I would also say that 5. is C because the |y-int| has to be less for silver than sodium right? :S

[ghadz7]

I would also say that 5. is C because the |y-int| has to be less for silver than sodium right? :S

yep, y-intercept gives you W.

[taiga]

I think this paper was riddled with errors!

[Elnino_Gerrard]

Q9 ure right i remeber doing this in class teacher said answer waz wrong.