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Flashcards in basic lens shape Deck (20)
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1

refraction

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

2

lens

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

3

2 types of lenses

converging
diverging

4

attributes of a converging lens

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

5

attributes of a diverging lens

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

6

shape of converging lens

"o" shape (cOnverging)

7

shape of diverging lens

"i" shape (dIverging)

8

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

entering and leaving the lens

9

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

rays are brought together

10

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

rays are split apart

11

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

thick / small / farther

12

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

thin / large / closer to

13

what does the focal point position depend on?

index of refraction of lens material
curvature

14

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

more / closer

15

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

more / closer

16

when does spherical aberration (in thick lenses) occur?

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

17

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

close to the principal axis

18

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

near the edges

19

chromatic aberration

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

20

how can aberrations be corrected?

combining many lenses together or using thinner lenses