CHAPTER 30 VOCABULARY
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| lens | a piece of glass or other material that can bend parellel rays of light so that they cross or appear to cross, at a single point.
🗑
|
||||
| converging lens | a lens that is thickest in the middle, causing parellel rays of light to converge to a focus
🗑
|
||||
| convex lens | a lens that is thickest in the middle, causing parellel rays of light to converge to a focus
🗑
|
||||
| diverging lens | a lens that is thinnest in the middle and that causes parallel rays of light to diverge
🗑
|
||||
| concave lens | a lens that is thinnest in the middle and that causes parallel rays of light to diverge
🗑
|
||||
| principal axis | the line joining the centers of curvature of the surfaces of a lens
🗑
|
||||
| focal point | for a converging lens the point at which a beam of light parallel to the principal axis converges for a diverging lens the point from which such a beam appears to come.
🗑
|
||||
| focal plane | a plane passing through either focal point of a lens that is perpendicular to the principal axis. converging lens any incident parallel beam of light converges. to a point somewhere on a focal plane.
🗑
|
||||
| focal length | the distance between the center of a lens and either focall point
🗑
|
||||
| real image. | an image that is formed by converging light rays and that can be displayed on a screen
🗑
|
||||
| virtual image | an image formed through reflection or refraction that can be seen by an observer that can be seen by an observer but cannot be projected on a screen because light from the object does not actually come to a focus
🗑
|
||||
| ray diagram | a diagram showing rays that can be drawn to determine the size and location of an image formed by a mirror or lens
🗑
|
||||
| eye piece | lens of a telescope closest to the eye; enlarges the real image formed the first lens.
🗑
|
||||
| objective lens | in an optical device using compound lenses the lens closest the object observed.
🗑
|
||||
| cornea | the transparent covering over the eyeball
🗑
|
||||
| iris | the colored part of the eye that surrounds the pupil. controls the light going in and out.
🗑
|
||||
| pupil | the opeaning inthe eyeball through which light passes
🗑
|
||||
| retina | the layer of light. sensitive tissue in back of the eye
🗑
|
||||
| farsighted | term applied to a person who has trouble focusing on near by objects because the eyeball is to schort that images form behind the retine
🗑
|
||||
| nearsighted | term applied to a person who can clearly see nearby objects but not clearly see distant objects. images form in front of the retina.
🗑
|
||||
| astigmatism | defect of the eye caused when the cornea is curved more in one direction than in another.
🗑
|
||||
| aberration | distortion in n image produced by a lens
🗑
|
||||
| fovea | the part of the eye in the most center part where you have your sharpest vision
🗑
|
||||
| blind spot | a part of the eye where the image/vision is not recieved
🗑
|
||||
| accommodation | the process by which the vertebrate eye changes optical power to maintain a clear image on an object.
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
Wardlaw
Popular Science sets