Convex and concave lens Study guides, Class notes & Summaries

ASVAB General science Exam 171 Questions with Verified Answers Arthropods - CORRECT ANSWER invertebrates with segmented bodies and jointed legs Monera - CORRECT ANSWER most primitive kingdom; organisms are prokaryotic; includes bacteria chordata - CORRECT ANSWER vertebrates animals; includes man fiber - CORRECT ANSWER provides bulk w/c allows the large intestine to carry away waste matter arteries - CORRECT ANSWER carry blood from the heart to the tissues of the body veins - CO...

emmetropia - ANSWER normal refraction presbyopia - ANSWER natural elasticity of the lens is lost w/ age. Lens is unable to assume more spherical shape for viewing near objects. requires a convex lens hyperopia - ANSWER farsightedness, eyeball is too short, light rays converge toward a point behind the retina. requires a convex lens myopia - ANSWER nearsightedness, eyeball is too long, light rays hit in the front of the retina. requires a concave lens. astigmatism - ANSWER irregular c...

ABO Practice Test Questions And Correct Answers, Over 400 Multiple choice Questions And Answers. When discussing thick lenses, the factors which are considered in computing the lens power are: a. front curve, thickness and index b. back curve, thickness and index c. front curve, back curve and thickness d. front curve, back curve, thickness and index d. front curve, back curve, thickness and index Toric transposition shows: a. lens thickness b. power in principal meridians c. the...

vitreous humor - ANSWER the transparent, colorless mass of soft, gelatinous material which fills the eyeball behind the lens: 1.42 - ANSWER the index of refraction of the crystalline lens is: 1.37 - ANSWER the cornea has an index of refraction of: 6 - ANSWER the extra-ocular muscles are inserted into the sclera and serve to rotate the eye in all possible directions. There are _______________ of these muscles in each eye. sclera and cornea - ANSWER the fibrous tunic is comprised of th...

Reflection : The bouncing back of a wave when it hits a surface through which it cannot pass. Transmission : the passage of light through an object Interference : the combination of two or more waves that results in a single wave Diffraction : The bending of a wave as it moves around an obstacle or passes through a narrow opening Refraction : Change direction and or speed refractive index : a measure of the light-bending ability of a medium 2 | P a g e Refractive index equation :...

When discussing thick lenses, the factors which are considered in computing the lens power are: a. front curve, thickness and index b. back curve, thickness and index c. front curve, back curve and thickness d. front curve, back curve, thickness and index - ANSWER d. front curve, back curve, thickness and index Toric transposition shows: a. lens thickness b. power in principal meridians c. the power of the ADD d. the lens diameter - ANSWER b. power in principal meridians Increa...

optic zone - Answer the central portion of a contact lens which contains the refractive power and generally corresponds to the central corneal cap posterior apecal radius - Answer this term is generally used in reference to spin-cast soft lenses. the curvature of the posterior surface of the lens changes with the refractive power. the radius of curvature is measured at the apex of the posterior surface. steeper base curve - Answer occurs when the posterior radius of curvature is decreased ...

What are the 2 most common measurements used in microscopy - micrometer and nanometer describe simple microscopes and compound microscopes - simple microscopes contain a single lens; compound microscopes contain a group of diverse lenses What is refracted light - "light whose rays have been bent out of their original course by passing through a transparent membrane" list 3 basic lens shapes - flat, convex, and concave what is the "resolving power" of a microscope lens - ability to dis...

a lens focal length may be altered by? - changing the curvature of one surface what controls the amount of light that enters the eye? - Iris lights changing direction as it passes from one medium to another is called what? - refraction meniscus, equiconcave and flat concave are all, what? - minus lenses what term is used to describe the eyes tendency to TURN from its normal position? - phoria refractive condition where light focuses directly ON the retina...? - e...

ASVAB general science latest update graded A+ arthropods invertebrates with segmented bodies and jointed legs monera most primitive kingdom; organisms are prokaryotic; includes bacteria chordata vertebrates animals; includes man fiber provides bulk w/c allows the large intestine to carry away waste matter arteries carry blood from the heart to the tissues of the body veins carry blood back to heart from the cappilaries cappilaries permit the exchange of materials between the blood & the bo...