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 Need Chrome for all devices except iOS not supported yet, Mac can but need to use Chrome.

 

 

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For Teachers

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Software Requirements

SoftwareRequirements


Android iOS Windows MacOS
with best with Chrome Chrome Chrome Chrome
support full-screen? Yes. Chrome/Opera No. Firefox/ Samsung Internet Not yet Yes Yes
cannot work on some mobile browser that don't understand JavaScript such as.....
cannot work on Internet Explorer 9 and below

 

Credits

Félix J. García Clemente; Tze Kwang Leong; Loo Kang Wee

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Using webpage and diffraction grating with 3D printed holder (need to print yourself)  to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials

 Get it on Google Play  https://itunes.apple.com/us/app/light-analyzer/id1431659002?mt=8  

Resources to make the spectrometer work

https://publiclab.org/sites/default/files/8.5x11mini-spec3.8.pdf SpectralWorkbench.org

https://publiclab.org/wiki/smartphone-spectrometer Smartphone spectrometer How to 3D Print Edited by Joseph Tan Jit Bin (NUSHS)

https://www.ebay.com/itm/Diffraction-Grating-Roll-Sheet-Linear-1000-lines-mm-Laser-Holographic-Spectrum-/280859388704?_ul=SG

For Teachers

Setup
 
 
  1. navigate to the website https://iwant2study.org/ospsg/index.php/interactive-resources/physics/04-waves/03-electromagnetic-spectrum/643-datalogger and click on the latest thumbnail
  2. prepare the physical apparatus needed 
  3. discharge lamps, handphone, diffraction grating setup 3D printed , rubber 
  4. on the handphone it should look like this, agree to let Chrome mobile take video and sound if prompted
  5. fix the diffraction grating using a rubber to the back camera of the phone as shown 
  6. fix a lamp on the discharge lap setup and turn it on, say first lamp is Helium
  7. point the camera with the diffraction grating on the table, make sure the fluorescent lamp on the room is able to the captured through the grating as a reference light spectrum source pattern
  8. click calibrate 
     
  9. after clicking calibrate, the display will show the fluorescent lamp spectrum as the light from the fluorescent lamp came through the diffraction grating intot he camera to produce this image
  10. click identify
  11. after identify, point the camera with the diffraction grating as a new light source say the Helium lamp discharge
  12. click confirm button
  13. after confirm, 
  14. click compare to compare with our results from the internet as possible answers.
  15. while doing the new light, make sure not to shift the diffraction grating position from the camera on the phone else, need to re-calibrate with fluorescent light again
  16. Next light source say mercury, click identify
  17. aim the camera through the diffraction grating to get a light emission spectrum and click identify
  18. after identify, the screen may say something like mercury found
  19. click compare and see the line emission lines from phone (above) to the picture resource from internet (below) 
  20. next, try Neon lamp 
  21. click on the identify and aim the camera on the lamp 
  22. click compare to see the result from the camera (above) and the resource of the internet (below)
  23. so it is possible to use the phone via our webpage to gather emission spectrum and even identify some of the common gases in our database.
1 mm slit
https://iwant2study.org/ospsg/index.php/643

 

2 mm slit Bigger slit = brighter but less defined (wider peaks)
https://iwant2study.org/ospsg/index.php/643

Video

  https://www.youtube.com/watch?v=XQiUvY94uMc

 

  https://www.youtube.com/watch?v=pVV14jZyAqg

 

https://www.youtube.com/watch?v=hZkVYuw4pJ4   Making your Foldable Paper Cellphone Spectrometer by Marysusan Noll

 Version:

  1. prototype: https://iwant2study.org/lookangejss/00workshop/2017FelixPaco/day4/ejss_model_dataLogger/dataLogger_Simulation.xhtml 
  2. https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_dataLogger/ 
  3. looking for the old 2018 version? https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer/spectrumanalyzer_Simulation.xhtml Use this instead. 

  4. 2019 version 2:  https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v2/

  5. 2019 version 3:  https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v3/

  6. 2019 v4: https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v4/ 

  7. 2019 v5: https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v5/

  8. https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v7/

  9. https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v9/

  10. https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v10/

     

  11. https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v11/

     

  12. https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v12/

  13. https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v13/

  14. https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v14/ identify gas more correctly before change layout

  15. https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v15/ before changing to landscape again

  16. https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v19/

     

  17. https://iwant2study.org/lookangejss/04waves_13electromagneticspectrum/ejss_model_spectrumanalyzer_2019_v20/

Other Resources

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Parent Category: 04 Waves
Category: 03 Electromagnetic Spectrum
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