Topic change suggestion

As some members have seen a good design of Calorie Burns Sports interactive leaning objects in another class, we discussed maybe there is a need to change our topic. I think two topics maybe very interesting for referencing:

(1) How lens work (image formation)

The focal length of a lens (from wikipedia):

where

f is the focal length of the lens,

n is the refractive index of the lens material,

R₁ is the radius of curvature of the lens surface closest to the light source,

R₂ is the radius of curvature of the lens surface farthest from the light source, and

d is the thickness of the lens (the distance along the lens axis between the two surface vertices).

Other References:
http://www.youtube.com/watch?v=brTzn9VoGks
http://webphysics.davidson.edu/physlet_resources/dav_optics/examples/eye_example.htmlRelations between growth of plant with water, light, carbon dioxide.
http://www.youtube.com/watch?v=E2EmowDS0U4&feature=related


(2) Photosynthesis

The formula for photosynthesis is:
6CO₂ + 6H₂O + energy from light ----> 6O₂ + C₆H₁₂O₆
carbon dioxide + water + energy from light --> oxygen gas + glucose



Other References about Photosynthesis:
a whiteboard from Youtube: http://www.youtube.com/watch?v=3ekysVrxIUI
http://www.biologycorner.com/resources/photosynthesis-overview.gif
http://ellerbruch.nmu.edu/classes/cs255w03/cs255students/teabbott/p4/page1.html
http://ilo.ecb.org/SourceFiles/photosynthesis.swf
http://phet.colorado.edu/simulations/index.php