I have a HSC physics assessment task (Yr 12 Australia) due in a few days where we had to take measurements of the photoelectric effect (VStop, Wave no/length, F) etc with different filters and find an approximation for H, by manipulating different equations etc.(adsbygoogle = window.adsbygoogle || []).push({});

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

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Finding and approximation for Planck's constant ( H )

**Physics Forums | Science Articles, Homework Help, Discussion**