single refracting surface

Question 1

radius

Answer 1

never changes in a spherical object, even if it is broken into pieces

Question 2

Where is the optical axis in a spherical object?

Answer 2

(0,0)

Question 3

Anything that looks to the right

Answer 3

+

Question 4

Anything that looks to the left

Answer 4

-

Question 5

What units is radius of curvature in

Answer 5

meters

Question 6

what units is curvature in?

Answer 6

diopters (inverse of meters)

Question 7

What relation to curvature and radius of curvature have?

Answer 7

inverse. small radius of curvature has large curvature

Question 8

A nearly flat surface has…

Answer 8

nearly infinite radius of curvature

Question 9

Plane surface and curvature/radius of curvature

Answer 9

plane surface has infinite radius of curvature, 0 curvature

Question 10

What is the origin of ever measurement?

Answer 10

apex

Question 11

focal point

Answer 11

point where all rays parallel to each other and optical converge at the same point

Question 12

secondary focal point

Answer 12

point at which the focal point seems to originate from

Question 13

Optical Power

Answer 13

How strong or weak the system is. The most important thing for optical element. It determines the properties of the optical element.

Question 14

How are focal point and optical power related?

Answer 14

inversely P=1/f (or n/f if in any medium other than air)

Question 15

Optical power equation

Answer 15

P=(n’-n)/R n’=2nd medium, n=first medium, R=radius of curvature

Question 16

What are the units of optical power

Answer 16

diopters

Question 17

the optical power of a single refracting surface is dependent on

Answer 17

radius of curvature, refractive index of material, refractive index of environment

Question 18

Concave surface

Answer 18

negative lens, focal point traces before the optical surface

Question 19

The algebraic sign of the radius of curvature depends on…

Answer 19

the orientation of the vector defining the radius of curvature (right or left)

Question 20

focal planes

Answer 20

perpendicular to optica axis and the focus

Question 21

positive (converging) lens focal point

Answer 21

• the principal focus is the point of convergence of a ray bundle parallel to the optical axis
• the secondary focus is the point of origin for rays that when refracted by the lens become parallel

Question 22

negative (diverging) lens focal point

Answer 22

• the principal focus is the apparent point of origin of an originally parallel beam that when diffracted by the lens becomes divergent
• the secondary focus is the point that the beam appears to converge prior to being diffracted by the lens-while after diffraction emerges parallel to the optical axis

Question 23

what is the focal point of the eye?

Answer 23

retina

Question 24

optical power

Answer 24

P=(n2-n1)/R

Question 25

focal length of a lens

Answer 25

P=1/f

Question 26

refractive power and focal length of a lens depend on…

Answer 26

• the geometrical shape of the lens (curvature)

- the material refractive index, in relation to the surrounding medium

Question 27

refractive power and focal length of a lens does NOT depend on…

Answer 27

lens orientation