Photoelectric Effect

[jules]

A photoelectric clarification
A minimum photon energy necessary to eject electrons from a silver surface is about half that required to eject electrons from a sodium surface.
Does that mean that that on a graph of frequency v Energy, the X intercept of the silver graph is half of the X intercept of the sodium graph?

[/0]

In a graph of Energy vs Frequency,



Using,

When ,









In other words, yep

[jules]

wow thanks alot, very very thorough explanation

[anonuser0511]

hmm... Although this is pretty much the same as /0's post i just realised that...



double the y-axis intercept means double the x-axis intercept.

p.s. Does anyone know the reason why they don't use an graph? (something to do with the line being under the x axis being dotted?)

[TrueTears]

The dotted line is just used to extrapolate backwards to find the y intercept. These values don't actually exist.

[anonuser0511]

The dotted line is just used to extrapolate backwards to find the y intercept. These values don't actually exist.

ahh thanks

on another note i was going to say extrapolate, although is it extrapolate or interpolate in this case o.0?

edit:nvm google found me the answer 'tis extrapolate since we don't have two surrounding points to predict the data.