Mats Selen previews the upcoming eclipse and tells us how to view the sun without hurting our eyes.
The sun puts out a lot of energy. Even though it is 93 million miles away, looking at it with your bare eyes will very quickly hurt your eyes and can cause blindness.
To illustrate this I will show how to use the sun and a magnifying glass to light a fire. The magnifying glass is just like the lens in your eye – just a bit bigger.
We will build a pin-hole camera using a cardboard box, and will show how the pin-hole functions just like a lens does.
I will show some eclipse glasses and some pictures I took of the sun using my cell phone and these glasses. (I think you can buy eclipse glasses at the Parkland Planetarium for $1).