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Topic: Using a light sensor to study air pollution (Read 9217 times)
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Vernier Forum Admin
Administrator
Full Member
Posts: 104
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Posted on: 2002-02-26 14:34:00 by Fernando Espinoza
A 'detector' can be built with simple materials (e.g. a plastic container and transparent adhesive tape that can trap pollution particles. The detector is placed over the vernier light sensor and a reading taken when the tape is clean is the reference point. When the tape has been exposed, the 'dirty' readings can be compared to the clean ones to get a percentage of deposition of pollution on the detector. I have used it to develop projects that last several months and that enable students to get very good results when compared to the data published by the EPA.
Reference: Espinoza F. (2000). The Light Meter: A Powerful Tool in Physical Science. Science Activities. Vol.37, No.1. (10-15).
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Vernier Forum Admin
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Posts: 104
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Posted on: 2002-03-14 10:54:00 by Robyn Johnson
I have done this as well and it works like a charm. I have wanted to study cigarette smoke and indoor air pollution as well, but haven't done it yet. Let us know if any of you out there try something!
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leannaaker
Newbie
Posts: 7
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What a cool idea. We are starting a project next year to collect local data and relate it to problems of local interest (like light intensity and seasonal affective disorder....we live around Seattle), etc. This would be a cool thing to add in. I hadn't thought of the tape idea to capture particulates. Neat!
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rickr
Newbie
Posts: 1
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It might be cool also to use a ProScope (or other digital microscope) to take pictures of the particulates collected by the tape
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