You've all grown up knowing that you have an eye, two in fact! You never learned much about the eye in elementary school, but you sure will/did in middle school! Today's topic (question) is...: How does your eye direct light into the eye and then transfer it to the brain? Well, your eye has a tiny little hole called the pupil. The pupil is covered by your cornea which is just like a window, it's clear but blocks the rest of your eye. The pupil focuses and bends light so that means when things get really bright, your pupil tells the lens (which is farther back behind it) to get smaller. When things get dark your pupil tells the lens to get bigger. 
     After light passes through the pupil, light passes through the lens (so it can be adjusted). Then it goes into this jelly-like substance called the vitreous humor. Then the retina, where nerves take the light to the optic nerve which is a tunnel to the brain. I know it might sound confusing but with some research, you'll get it. Search "eye diagram" on Google Search and look at images for more information. It really is amazing how the eye and light work!
 
    Why is the sky blue? We already answered that question last week, but that was what I thought, now I'm talking about what I've learned and know. Well, the sky is blue because everything else is a color too. I mean we all know the sky isn't neon orange. Clearly, the sky is blue...but why? 


     The sky is blue because when light hits the sky is absorbs all the other colors, just not blue. It reflects blue, so that's why we see blue. It's like a red bouncy ball, it absorbs all the colors, including blue, but reflects red... that's why we see red when we play or look at the bouncy ball. It order for something to have color, it must absorb and reflect. Everything is the same way. Look at your grass, it's green, hopefully. Why is it green? Well it absorbs colors, but what does it reflect? It reflects green and that's why your grass...even though only your eyes are seeing the green. 


     Hopefully you now understand why the grass is green, why the sky is blue, and why a bouncy ball (which is red) is red. Absorb and Reflect (A & R) Absorb and Reflect. It's how color works, thankfully we have eyes that do the job for us so we don't have to figure out each objects color but looking at what it absorbs and what it reflects. I guess we have it pretty easy!