Calculating W on the Exam

[redmosez]

So I think I might have stuffed up the question on the exam that asks you to calculate W.

I used W = hf "zero"

But instead of using the value of h calculated from the graph I used the accepted value (4.14x10^-15) and ended up with something like 1.3 eV

Do you guys think i'd lose the marks, seeing as it asks you to use the graph? is using f "zero" from the graph enough?

[vietsmista]

yes

[methodsboy]

yeah the h value from graph was h=5.0 x 10^-14.....from that Ew was 1.5eV. So they might take a mark off

[Squida]

mmm, the question asked specifically using info from the graph

[ayaz]

So I think I might have stuffed up the question on the exam that asks you to calculate W.

I used W = hf "zero"

But instead of using the value of h calculated from the graph I used the accepted value (4.14x10^-15) and ended up with something like 1.3 eV

Do you guys think i'd lose the marks, seeing as it asks you to use the graph? is using f "zero" from the graph enough?

i did what was above but on the working space i also used the graph and estimated that the W is 1.5ev and used this to determine h and i put the answer to h and W NOT inside the BOX where you put the answer in but ON the TOP of the BOX and inside the box i did what redmosez did and put h=4.14E.14evs in the box and 1.3ev in the box....

do you think i could get the marks (3marks)