| A | B |
|---|
| transparent | material that transmits light without scattering so objects are clearly visible |
| convex lense | lense thicker in middle than edges |
| concave lense | lense thinner at middle and thick at edges |
| cornea | transparent covering of eye |
| retina | inner lining of eye converts image to electrical signals |
| refraction | change in direction of wayve when changes speed and medium |
| refracting telescope | uses convex lenses to gather light from distance objects |
| reflecting telescope | uses mirrors and concave lenses to collect and focus light from distant objects |
| microscope | uses two convex lenses with short focal lengths to magnify small, close objects |
