Light And Optics

Front 1

Absorption

Back 1

when light rays are taken into an object; often generates heat

Front 2

Angle of Incidence

Back 2

angle between the incident ray and the normal

Front 3

Angle of Reflection

Back 3

angle between the reflected ray and the normal

Front 4

Aqueous Humour

Back 4

structure that keeps the shape of the cornea

Front 5

Concave Lens

Back 5

piece of transparent material that is thinner in the middle than at the edges: light rays passing through it diverge or spread out

Front 6

Concave mirror

Back 6

reflecting surface that is curved inward like the inside of a bowl or spoon: light rays reflected from it converge

Front 7

Converge

Back 7

when the light rays past through an object and meet at a point on the other side, occurs when light hits a convex lens

Front 8

Convex Lens

Back 8

piece of transparent material that is thicker in the middle than at the edges: light rays passing through it converge or come together

Front 9

Convex mirror

Back 9

reflecting surface that bulges out like the back of spoon: light rays reflected from it diverge

Front 10

Diffraction

Back 10

when light rays are spread out (diverged) when they hit a surface

Front 11

Divergent

Back 11

when lights ray past through an lens and spread apart on the other side, this occurs when light hits a concave lens

Front 12

Focal Point

Back 12

point at which light rays meet, or appear to meet, after being reflected by a mirror, or refracted by a lens

Front 13

Incident Ray

Back 13

ray of light that arrives at a mirror or other substance

Front 14

Law of Reflection

Back 14

angle of incidence of a wave hitting a surface equals the angle of reflection

Front 15

Normal

Back 15

line perpendicular to a surface (that is, forms a 90 degree angle with the surface)

Front 16

Opaque

Back 16

when something is solid, usually coloured

Front 17

Reflection

Back 17

when light bounces off a surface and image is visible

Front 18

Refraction

Back 18

when light bends or changes direction when passing through something

Front 19

Transparent

Back 19

totally see-through

Front 20

Bioluminescent

Back 20

emitting light by organism such as fireflies and many animals that live in the ocean

Front 21

Chemiluminescent

Back 21

discharge of light by chemical reaction without producing heat

Front 22

Diffuse

Back 22

to spread something throughout something else, or become spread throughout

Front 23

Eye

Back 23

organ of vision

Front 24

Eye Spots

Back 24

light-sensitive cells distributed over an animal's body

Front 25

Frequency

Back 25

the rate of occurrence, number of times that something happens during a period of time

Front 26

Laser

Back 26

device emitting focused beam of light

Front 27

Light

Back 27

energy producing brightness that makes seeing possible

Front 28

Light Year

Back 28

unit of distance in astronomy

Front 29

Luminous

Back 29

light-emitting, emitting or reflecting light

Front 30

Plane Mirror

Back 30

a flat or level surface

Front 31

Photon

Back 31

electromagnetic radiation demonstrating both particle and wave properties

Front 32

Ray

Back 32

narrow beam of light from the sun or an artificial light source

Front 33

Real Image

Back 33

optical image of something that is produced by reflection or refraction and can be transferred onto a surface such as the film inside a camera

Front 34

Reflected Ray

Back 34

reflection image of somebody or something that appears in a mirror or other reflection surface

Front 35

Translucent

Back 35

when some light is able to pass through but only diffusely, objects on teh other side cannot be clearly distinguished

Front 36

Transparent

Back 36

see-through, allowing light to pass through easily so that objects on the other side can be seen clearly

Front 37

Visual Spectrum

Back 37

referring to seeing, able or intended to be seen by the eyes

Front 38

Wavelength

Back 38

length of wave cycle, the distance between two points on adjacent waves that have the same phase