Back in grade school we did a unit on lenses both concave and convex, I have been fascinated ever since. Which is why I was so excited when I found a set of glass lenses recently.
And what better place to test them then to go outside! I started with the concave lens which is thicker on the outer rims and thin on the inside. I took a moment to look through it and move it back and forth to investigate the focal lengths and found that everything looked a bit smaller through the lens, but very clear.
I then picked up the convex lens. Thin along the edges and thick in the center, small worlds suddenly came to life within its magnified scope.
It was also fun to play with the focal length of this lens, especially when moved to about an arms length away...
Take this lovely dried seed pod for example. When viewed at a glance all appears normal, but...
... when viewed through a convex lens at just the right distance, it suddenly flips upside down.
With out the wonders of lenses within the human eye, our world would quite literally be turned upside down.
Lenses are such a great way to to explore the world, I also tried layering two concave and convex lenses and concave with a convex lens to explore the possibilities. With so much out there to see, it only makes sense to understand how we see it.
Enjoy exploring the possibilities!
P.S. Don't forget to enter our current Secret Garden Giveaway here!
*Last time in knowing green: Spring Crystals