basic lens shape

Question 1

refraction

Answer 1

the bending of light as it travels from one medium through to a different medium

Question 2

lens

Answer 2

a transparent object with at least 1 curved side that causes light to refract

Question 3

2 types of lenses

Answer 3

converging

diverging

Question 4

attributes of a converging lens

Answer 4

thicker across the middle
thinner at the edges
converges (brings together) light

Question 5

attributes of a diverging lens

Answer 5

thinner across the middle
thicker at the edges
diverges (separates) light

Question 6

shape of converging lens

Answer 6

“o” shape (cOnverging)

Question 7

shape of diverging lens

Answer 7

“i” shape (dIverging)

Question 8

even though the light is refracted twice, we are only concerned with the path of light ____________________

Answer 8

entering and leaving the lens

Question 9

what happens to parallel rays that hit one side of a converging lens?

Answer 9

rays are brought together

Question 10

what happens to parallel rays that hit one side of a diverging lens?

Answer 10

rays are split apart

Question 11

large curvature = _____ lens, _____ radius, F is _____ lens

Answer 11

thick / small / farther

Question 12

small curvature = _____ lens, _____ radius, F is _____ lens

Answer 12

thin / large / closer to

Question 13

what does the focal point position depend on?

Answer 13

index of refraction of lens material

curvature

Question 14

lenses with the same shape but higher indices of refraction bend rays ____ making focal point _____ to the lens

Answer 14

more / closer

Question 15

lenses with larger curvatures but with the same index of refraction bend rays ____, making focal point _____ to the lens

Answer 15

more / closer

Question 16

when does spherical aberration (in thick lenses) occur?

Answer 16

when light rays from an object strike a thick lens far from the principle axis and do not form a clear image point

Question 17

only parallel light rays that are _________ converge at F (focal point)

Answer 17

close to the principal axis

Question 18

parallel light rays that hit areas _________ do not converge at F (focal point)

Answer 18

near the edges

Question 19

chromatic aberration

Answer 19

white light disperses into colours (lens acts as prism)
a single, thick lens with spherical surfaces: the edges of lenses are similar in shape to prisms, so the edges disperse the light into colours

Question 20

how can aberrations be corrected?

Answer 20

combining many lenses together or using thinner lenses