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I already found an fairly close approximation (1.7e-34) H=6.626e-34, but i just want to no if my method was right or not.

The work function was found by graphing Kemax against the F (Kemax = QVstop/F). A trend line was extended back to get f (3.6e-34) Approx. An approximation for H was found by getting the gradient of the slope of KEMax + W / F (2e-34). But since excel rounded it a bit i put it in my calculater (H = QVstop + W]/F) and got 1.69e-34

So is that the rite way to do it or is there a better way

Thnx in advance 4 ne comments