Lenses (pulled from deck 8.2)

Question 1

lenses vs mirrors

Answer 1

lenses REFRACT light
mirrors REFLECT light

Question 2

lenses have two surfaces that affect light path

Answer 2

First surface: the surface when light enters from the air into the glass lens/object

Second surface: the surface where light exits the glass lens back into the air

Question 3

converging lens

Answer 3

thicker at the center

used to see things up close

Question 4

diverging lens

Answer 4

thinner at the center

used to see things far away

Question 5

lensmaker’s equation

Answer 5

f = focal length
n = index of refraction of the lens material
R1 = radius of curvature of the first lens surface
R2 = radius of curvature of the second lens surface

Question 6

lens power (equation)

Answer 6

Question 7

hyperopia

Answer 7

farsightedness

unable to see things close to the eye

Question 8

myopia

Answer 8

nearsightedness

unable to see things far away

Question 9

multiple lens systems: lenses in contact

Answer 9

A series of lenses with negligible distances between them behave as a single lens

Question 10

multiple lens systems: lenses not in contact

Answer 10

The image of one lens becomes the object of another lens

the image of the LAST lens is considered the “image of the system”

Question 11

magnification for a system of lenses not in contact (equation)

Answer 11

Question 12

spherical aberration

Answer 12

an optical problem that occurs when all incoming light rays end up focusing at different points after passing through a spherical surface

results in an image with blurry edges