Light and optics unit

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Natural Light Source

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Science

41 Terms

1

Natural Light Source

The sun

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2

Artificial Light

flashlight

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3

Incandescence

Light bulb

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4

Fluorescence

ultraviolet light

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5

Phosphorescent

glow in dark stars

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6

Chemiluminescence

Glow stick

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7

Bioluminescence

firefly

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8

absorbed

When light is absorbed it, doesn’t pass through the object

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9

transmitted

When light is transmitted it goes through the object

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10

reflected

light bounces off the object

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11

transparent object

a window, this is where light passes through

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12

translucent object

tissue paper, where light sort of passes through

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13

opaque object

a desk because light is absorbed and doesn’t pass through

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14

law of reflection

The angle of incidence is equal to the angle of reflection

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15

Concave Mirror

Images appear larger used for upside down view

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16

Convex Mirror

Images appear smaller and used for bigger view

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17

real vs. virtual image

Real image is where light converges and virtual is where light diverges

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18

why refraction occurs when light moves from air to water

because air is a less dense medium, so when it goes to a denser substance, it bends because it moves slower when going in

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19

Optic nerve

electric signals from eye to brain

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20

Retina

tissue where image is formed

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21

Sclera

white part of eye that maintains eye shape

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22

Ciliary muscle

focusing the eye

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23

Lens

changes direction of light

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24

Iris

the colored part that controls amount of light going in the eye

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25

Pupil

opening where light enters

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26

cornea

it helps focus light

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27

cones

see color

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28

rods

outlines/shapes

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29

aqueous humor

Provides nutrition to eye

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30

virtuous humor

Helps maintain the shape of the eye

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31

the film

retina because image focuses in the eye

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32

the diaphragm

iris because it controls the pupil and how much light enters

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33

the aperture

the pupil because it can adjust itself

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34

the lens

the lens because it focuses light

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35

blind spot

no light sensitive cells so you can’t see from there

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36

hyperopia

eye is too long so you can’t see close up

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37

Myopia

eyes are squished so you can’t see far away

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38

lens is used to correct myopia

the correct lens to use for myopia is a concave lens

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39

lens used to correct hyperopia

The correct lens for hyperopia is convex

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40

lens vs. mirror

lens is when light can pass through and a mirror is when light reflects or bounces off of that surface

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41

optical technology examples

VR - This helps treat lazy eye by making both eyes work by focusing on a certain thing

Glasses - This helps treat people with poor vision because when using certain lenses, the light will be directed in a certain way that helps your eye

Laser eye surgery - This helps treat poor vision by taking out the corneal tissue to fix it a bit and put it back in the eye to improve it

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