| A | B |
|---|
| Aberration | distortions of an image. |
| Converging lens | lens thats thicker in the middle. |
| What does a converging lens do? | makes parallel light come together or converge. |
| Diverging lens | lens thats thinnner in the middle. |
| What does a diverging lens do? | makes light spread out. |
| Farsighted | the image forms behind the retina, object has to be farther away to see. |
| Focal point | point where parallel light passing through a converging lens comes 2gether. |
| Lens | a special peice of glass(translucent material) that bends parallel rays of light so they focus & form an image. |
| Nearsighted | image forms in front of retina, meaning object has to be closer for person to see. |
| Ray diagram | representation that shows principal rays that can be used to determine size/location of image. |
| Real image | image formed from converging lens that focuses light from that image. |
| Retina | back of the eye, extremely sensitive to light. |
| Virtual image | no image can be projected b/c no light actually directed to image position. |
| What is a virtual image like? | a mirror or magnifying glass. |
| Angle of Incidence | angle made by incoming indicent ray to the normal. |
| Angle of reflection | angle made by reflected ray to the normal. |
| Critical angle | angle where light will no longer pass from 1 material to next, but back into original material. |
| Diffuse reflection | When light hits a rough surface and reflects in many directions. |
| Law of reflection | The angle of incidence is equal to the angle of reflection (90degrees) to the surface. |
| Reflection | when waves bounce back to original medium w/out being transmitted through to 2nd medium. |
| Refraction | when waves pass from one material to another, often being bent in the process. |
| Total internal reflection | where there is no refraction but waves are reflected back into original medium. |
| Virtual image | an image that cannot be projected b/c light does not start there. |
