Friday, August 28, 2009

Day 8: Physical Optics

This was a cool experiment, we got to play with different diffraction patterns , the one below is that of a blood cell that was inserted into a slide and placed over the slit. A Helium neon laser was shone through the slit creating a circular diffraction pattern. What you are meant to see is alternating dark and bright fringes but for the blood cell we only got to see 1 dark one, leaving us with dubious results.

We didn't get to do ourselves but got a demo from Dr Jones, who kept pulling electrons out of his pocket !

The diffraction pattern was really awesome to see. The electrons were thermionically emitted

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