Here are the materials and method for the basic spectrophotometer experiment Materials: 1. Paper template 2. Scissor 3. Light source (i.e. torchlight, portable light) 4. Paperboard (black colour) 5. Unused compact disc (CD) 6. Camera detector (i.e. webcam, laptop, mobile phone) Methods: 1. Make a foldable paper spectrophotometer using the paper template and follow the instruction as in https://publiclab.org/sites/default/files/8.5x11minispec3.8.pdf 2. Then, mounted the paper spectrophotometer to the camera detector. 3. Download any freely available spectral analyzer. 4. Test and observe the wavelength with and without the presence of a light source. 5. Finally, observe the wavelength with a different transparent colour sheets (you can choose any colour).   Troubleshooting/ problem(s) encountered for basic spectrophotometer experiment.

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