Posts Tagged ‘lens’

Eye see!

Monday, May 16th, 2011

Cow eye dissection by Susan Tansil on flickr

We’ll take a look (ha ha) at the structure of the eye, and learn how it captures light waves so that wecan see.

Eye-diagram

We’ll be able to identify the parts by name and also explain their function.  We’ll understand how the eye is like a camera, and we’ll do an eye dissection.

Application of lenses

Thursday, May 13th, 2010

telescope by Waifer X on flickr

Here are links to a couple of sites on ray diagrams.  This first one is factual.  This one is interactive, and covers the different types of image obtained when you place your object various distances from the the lens. 

Make sure you know the difference between a real and virtual image, an inverted and an upright image, and a magnified and diminished image.

Now that you know all about refraction, and how light bends as it passes through lenses, it’s time to take a look at where we use lenses in our daily (or not so daily) lives.  Microscopes, telescopes, cameras, binoculars, all contain at least one lens.  Your task is to select one application of lenses and do some research on it.  Prepare a glogster poster of your findings.  You must explain what type or types of lenses are present, what refraction has to do with your chosen application, and how it works.  Follow the links here to help get you started.