Saturday, September 13, 2008


The results were very repeatable when we plotted them.
Here is the first comparison chart of the DPF and the DPF with Erasure. The Polarization setting is A, with only two linear filters with a 45° difference between them.

Next I hope to post more comparison charts and conclusions next. Also we have collected enough data to last us awhile.

Wednesday, September 10, 2008


Here is the link to the raw data.  The preliminary evaluations of the data look excellent and most importantly repeatable.  I also would like to mention being acknowledged on the MAKE blog (Click here for the Make post on my experiment).  After we send the results and equipment back to SENSL I'd like to go back to the Horizontal Dual Polarized Filter (see pages 18-20 of my presentation).  Also, the results of this last experiment should keep us busy for a while.

Sunday, September 7, 2008

Final Readings

Yesterday we took the final readings. The dark count averaged around 25 photons per second. The raw data will be posted as soon as we can. We started with 12 different setups and decided on 3 trails each, we estimated it would take us 2 hours for the 36 tests. It ended up being a 3 hour, 39 test ordeal in total darkness! I mentioned earlier about the florescent glow even after the lights were off, because of this we couldn't turn on the lights, so we used flashlights.

More coming soon
-Raw Data
-Pictures (if they turn out)
-And more

Wednesday, September 3, 2008


I'm not sick any more, but school just started. So I'm planning to do the FINAL experiment this weekend.
Check back!

Sunday, August 31, 2008

Day Off

Sadly, I have a fever so I can't work on the experiment today. Hopefully I can get an update out tomorrow.

Saturday, August 30, 2008

Day 12 DPF

Today we actually did some readings on the DPF (Dual Polarized Filter, more in post "Day 10"). The last time we tried this we measured an interference pattern which was unexpected. Today we found, after a close inspection, that the needle in the DPF was slightly off center allowing light to pass through with out being polarized and also allowing a single polarization of light to go around both sides of the needle. We realized we should also check that the needle is centered and covers the seam between the two polarizations.

Here in this chart you can see a comparison between the DPF (Pink) no interference, and the needle (blue) interference.

Rap on partical acceleration