What other way would you want?

Challenged in September 2010 to come up with interesting facts every day by one of my work colleagues, I've since entertained him and those near his desk with bits of information dredged from my brain. Some of my audience went on holiday and still wanted the facts so I started posting here, every day I do one of them, usually Monday through Friday, and the occasional post on the weekend. I post these facts here almost every day and you will find two posts on some days to make any missing days.

Showing posts with label Lens. Show all posts

Thursday, June 09, 2011

Today’s interesting fact has to do with lenses.

The purpose of a lens is to focus light.

Children often learn about this is science classes, but before that many children learn to burn holes in cardboard, leaves and wood.

The average lens children play with to burn things focus light up to 1000 times.

The lens of your eye is better at focusing light, and is 2.5 times more effective.

Because the lens of the eye focuses mainly on the fovea, this is why they tell you to not look at the sun.