by Hadrian Paulo M. Lim
A Report on Light Spectra Filtered through Colored Water
Advised by: Paul Cabacungan
This experiment was conducted to test the capabilities of the DIY Spectrometer.
Setup:
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This was conducted in a dark room with no other light sources, except the light bulb.
The folder was placed such that light reflected from the water would be made visible.
Filtered Light
Through Orange Colored Water
140
120
100
80
Through Orange
Colored Water
60
40
20
0
-20
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0
500
1000
1500
Spectrum gathered with light passing through orange colored water, made using orange food coloring.
It is evident that blue light has been filtered, absorbed by the water.
This was gathered by passing the light directly through the water, not from the reflection as it was too weak to record and light could not be detected using the
spectrometer
Unfiltered Light
Unfiltered Light
180
160
140
120
100
80
Unfiltered Light
60
40
20
0
-20 0
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200
400
600
Light Spectrum picture and graph of a CFL.
Primary Red, Green, and Blue are present.
800
Spectrometer used:
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This was attached to a mobile phone and was used to take pictures of the light spectrum.
Offers mobility versus the webcam-laptop spectrometer setup.
Experiments to follow:
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Using different food coloring
Testing of soil with water
Testing of pond water