Lenses and Mirrors Science Unit
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| beam | a group of closely related rays. May also be used to mean one ray.
🗑
|
||||
| concave | Hollowed or curved inward. The surface of a concave mirror or lens curves inward like the depression in a bowl.
🗑
|
||||
| converge | to come together at a point.
🗑
|
||||
| convex | bulging or curved outward. The surface of a convex mirror or lens bulges out like the outer surface of a ball.
🗑
|
||||
| cornea | the transparent, rounded, outer surface of the eye that helps to focus light onto the retina.
🗑
|
||||
| diverge | to spread apart.
🗑
|
||||
| farsighted | able to see objects better from a distance than from close up.
🗑
|
||||
| focus | to make an image clear. To cause rays to converge to a point, or to cause a lens or mirror to project an image.
🗑
|
||||
| hypothesis | a preliminary explanation used as the basis for an experiment.
🗑
|
||||
| image | the reproduction of an object formed by a lens or mirror.
🗑
|
||||
| iris | the colored ring around the pupil that expands and contracts to control the amount of light entering the eye.
🗑
|
||||
| law of reflection | a principle that states that a light ray is reflected by a flat mirror at the same angle at which it strikes the mirror.
🗑
|
||||
| lens | a specially shaped piece of refractive material designed to change the way objects on one side of it look by changing the paths of light rays that pass through the material.
🗑
|
||||
| lens (in the eye) | the transparent, convex body in the eye behind cornea and iris that helps to focus light onto the retina.
🗑
|
||||
| nearsighted | able to focus on objects that are close up, but unable to see distant objects clearly.
🗑
|
||||
| optic disc | the "blind spot" in the eye where the optic nerve connects to the retina.
🗑
|
||||
| optic nerve | the thick cord of nerves that carries visual information from the eye to the brain, where it is interpreted.
🗑
|
||||
| pupil | the opening in the eye through which light enters.
🗑
|
||||
| ray | an imaginary straight line that represents the path light takes as it travels.
🗑
|
||||
| real image | an image formed when light rays converge, so that it looks as if there were another objet at the place where the rays meet. Real images can be formed by only convex lenses and concave mirrors.
🗑
|
||||
| reflect | to bounce off of a surface; to form an image of an object, as in a mirror.
🗑
|
||||
| refraction | the bending or redirection of light rays at the point at which they travel from one substance into another
🗑
|
||||
| retina | the inner layer of the eye, or "screen," onto which images are projected; is sensitive to light and passes information about the image through the optic nerve to the brain.
🗑
|
||||
| sclera | the outer coating of the eye, commonly known as the "whites" of the eye.
🗑
|
||||
| Snellen eye chart | a chart consisting of different sized rows of letter and used for testing eyesight.
🗑
|
||||
| variable | any measurable or observable quantity that can change.
🗑
|
||||
| virtual image | an image that results from a lens or mirror changing the paths of light rays so that they appear to come from somewhere beyond the lens or from within the mirror. Virtual images can be formed by all lenses and mirrors.
🗑
|
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:
ctalley
Popular Science sets