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By mrmackenzie, April 20, 2009 9:17 pm

I found an useful simulation of the photoelectric effect here.  You can change the metal under investigation (we used Zinc in class).  You can also vary the wavelength and irradiance of the light.   Notice that below the theshold frequency you can’t get  any photoelectrons, even if you set the light to its brightest setting.

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By mrmackenzie, April 19, 2009 1:31 pm

The site I showed you in class is The Particle Adventure.  You can use that site to learn more about charged particles and their behaviour in magnetic fields.  There’s also information about particle accelerators, the Large Hadron Collider and other “Big Physics”.

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By mrmackenzie, April 18, 2009 6:02 pm

We looked at the photoelectric effect this week.  I’ve been looking for some video demonstrations but there are very few explanations that I would be happy to recommend.  The animation I used in class is available here.  I also found a nice demonstration on youtube (see below) that uses a different type of electroscope to indicate the presence of charge.

This video is also attached as a podcast.

Podcast Video [ 8:09 ] Download (9)

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By mrmackenzie, April 15, 2009 8:53 pm

Here is your homework on the unit 3 topics we covered before the Easter holidays.  Please hand your work in no later than Friday 24th April.

eBook Download (6)

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By mrmackenzie, April 11, 2009 10:39 am

All AH investigation reports submitted for proof reading over the holidays have been returned by email.  If you didn’t get yours, please check your junk/spam folder.  If it’s still not there, please leave a comment here (I’ll delete it once I read it) to let me know it’s not arrived and I’ll resend.

Happy Easter!