1. | iris | A. | A lens that is thinner in the center than at the edges. | |
2. | lens | B. | A curved piece of glass or other transparent material that is used to refract light. | |
3. | rods | C. | An image of a distant object caused by refraction of light as it travels through air of varying temperature. | |
4. | cones | D. | The layer of receptor cells at the back of the eye on which an image is focused. | |
5. | pupil | E. | Cells in the retina that detect dim light. | |
6. | cornea | F. | The point at which light rays parallel to the optical axis meet, or appear to meet, after being reflected (or refracted) by a mirror (or a lens). | |
7. | mirage | G. | The opening in the center of the iris through which light enters the inside of the eye | |
8. | retina | H. | The transparent tissue that covers the front of the eye. | |
9. | real image | I. | Short, thick nerve that carries signals from the eye to the brain. | |
10. | convex lens | J. | The ring of muscle that surrounds the pupil and regulates the amount of light entering the eye; gives the eye its color. | |
11. | focal point | K. | An upside-down image formed where rays of light meet. | |
12. | optic nerve | L. | A lens that is thicker in the center than at the edges. | |
13. | concave lens | M. | A mirror with a surface that curves outward | |
14. | convex mirror | N. | A measure of the amount a ray of light bends when it passes from one medium to another. | |
15. | index of refraction | O. | Cells in the retina that respond to and detect color. |
J | 1. | iris | A. | A lens that is thinner in the center than at the edges. |
B | 2. | lens | B. | A curved piece of glass or other transparent material that is used to refract light. |
E | 3. | rods | C. | An image of a distant object caused by refraction of light as it travels through air of varying temperature. |
O | 4. | cones | D. | The layer of receptor cells at the back of the eye on which an image is focused. |
G | 5. | pupil | E. | Cells in the retina that detect dim light. |
H | 6. | cornea | F. | The point at which light rays parallel to the optical axis meet, or appear to meet, after being reflected (or refracted) by a mirror (or a lens). |
C | 7. | mirage | G. | The opening in the center of the iris through which light enters the inside of the eye |
D | 8. | retina | H. | The transparent tissue that covers the front of the eye. |
K | 9. | real image | I. | Short, thick nerve that carries signals from the eye to the brain. |
L | 10. | convex lens | J. | The ring of muscle that surrounds the pupil and regulates the amount of light entering the eye; gives the eye its color. |
F | 11. | focal point | K. | An upside-down image formed where rays of light meet. |
I | 12. | optic nerve | L. | A lens that is thicker in the center than at the edges. |
A | 13. | concave lens | M. | A mirror with a surface that curves outward |
M | 14. | convex mirror | N. | A measure of the amount a ray of light bends when it passes from one medium to another. |
N | 15. | index of refraction | O. | Cells in the retina that respond to and detect color. |