O Level Template About

Topics

Light
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.

Sample Learning Goals

There is a common misconception among students:
Blocking part of the lens surface would block the corresponding part of the image.

Version:

1. http://weelookang.blogspot.sg/2015/05/ejss-light-intensity-after-blocking-of.html
2. http://weelookang.blogspot.sg/2012/10/ejs-open-source-lens-with-light-path.html
3. http://iwant2study.org/lookangejss/04waves_13light/ejs/ejs_model_thinlensintensitywee.jar
4. http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=219.0