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Refraction of light
Thin lenses

Description Thin Len Intensity

The intensity of the image for the object is reduced is some light path were blocked (the whole image is still there).
Select from drop-down menu or drag to "block part of light path" button or drag lower end of the black line to lower position to block part of light paths.
The intensity is not the same if part of the light paths were blocked.
You can change the slit position and its width with mouse drag.
Intro Page Designed by Fu-Kwun Hwang For more info:  


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Software Requirements


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



Fu-Kwun Hwang; lookang

end faq


Cover art


  1. JavaScript version EJSS Light Intensity After Blocking of Lens Model by Fu-Kwun Hwang and Loo Kang Wee
  2. Digital Library Java version Light Intensity Model by Fu-Kwun Hwang and Loo Kang Wee
  3. Java version What will happened if part of the light path were blocked by Fu-Kwun Hwang

Other Resources


end faq


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Article ID: 114
Article Category ID: 37
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  • Secondary
  • Light
  • Junior College
  • Mathematics
  • EasyJavaScriptSimulation
  • Android/iOS including handphones/Tablets/iPads
  • Windows/MacOSX/Linux including Laptops/Desktops
  • ChromeBook Laptops
  • Science
  • Simulations