Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why

Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




share
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

Physics ch 30

CHAPTER 30 VOCABULARY

QuestionAnswer
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.
Created by: Wardlaw