Thursday, 17 March 2011

Year 13 Homework assignment 17th March

Stopping potential experiment and presentation.
You will need your readings of stopping potential and wavelength. Calculate the frequency for each wavelength of light that you used. Then plot a graph of stopping potential (y)against frequency (x).
The equation that relates these quantities is
eVs = hf −φ
Rearrange this to find the equation for your straight line graph. What is the gradient of your graph? What should it be? How accurate was your experiment?
Prepare a short 5 min presentation on the workings of one of these microscopes; EITHER an STM or a TEM for next Thursday. Good luck!

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