Energy - Light And Sound

Front 1

Cornea

Back 1

Is the clear window at the front of the eye.

Protects the eye and bends light.

Front 2

Lens

Back 2

Located behind the iris and the pupil. Is a jelly-like flexible lens and can adjust focus. Can change shape depending on the distance of the object and bends the light received to focus on the retina.

Front 3

Pupil

Back 3

Regulates the amount of light that enters the eye.

Front 4

Retina

Back 4

Contains 2 types of sensitive light cells - cones and rods. Absorbs light and turns it into electrical signals.

Front 5

Scleria

Back 5

Outer layer of the eye - 'white' of the eye and is tough and robust. It protects the inner structures of the eye. Maintains the shape of the eye.

Front 6

Optic Nerve

Back 6

Sends the images from the retina/eye to the brain.

Front 7

Vitreous Humour

Back 7

Jelly like substance that gives they eye its shape

Front 8

Aqueous Humour

Back 8

Watery liquid in the smaller cavity of the eye. Maintains shape of the eye. Allows oxygen and nutrients to diffuse to all parts of the eye.

Front 9

How does light travel?

Back 9

Light travels in straight lines

Front 10

Visible light spectrum

Back 10

The small spectrum of light we can see with the human eye

Front 11

Radio Wave

Back 11

Are used for communication and controlling model aeroplanes.

Front 12

Microwave

Back 12

Are used for cooking food and for satellite transmissions. Mobile phones use microwaves.

Front 13

Infra red

Back 13

Is also known as heat radiation. Used in night vision equipment, remote controls and to heat things up.

Front 14

Visible light

Back 14

Is used to see with and transmit information down optical fibers. It is the part of the Electromagnetic Spectrum that we can see.

Front 15

Ultra violet

Back 15

Is used for security marking property, sun beds and disco effects. May cause skin cancer.

Front 16

X-rays

Back 16

Are used to look inside the body. X-rays can pass easily through flesh, but not through bones. May cause skin cancer.

Front 17

Gamma Rays

Back 17

Are used to kill harmful bacteria so that food keeps fresher longer, sterilizing hospital equipment and treating cancer. May cause cancer.

Front 18

Angle of Reflection

Back 18

The angle of which the light reflects. The angle of reflection and the angle of incidence are always equal.

Front 19

Refraction

Back 19

The process of light slowing down/speeding as it moves through and object

Front 20

Law of Reflection

Back 20

The law of reflection states that the incident ray, the reflected ray, and the normal to the surface of the mirror all lie in the same plane. Furthermore, the angle of reflection is equal to the angle of incidence .

Front 21

How does sound travel?

Back 21

Sound travels in waves

Front 22

Why does light bend in water?

Back 22

Because of the change in speed.

Front 23

Opaque

Back 23

No light rays get through. They produce shadows.

Front 24

Translucent

Back 24

Some light rays travel through.

Front 25

Transparent

Back 25

All light travels through.

Front 26

why can't sound travel through a vaccuum

Back 26

Sound cannot travel through a vacuum. A vacuumis an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.

Front 27

Ray

Back 27

narrow beam of ligh

Front 28

Beam

Back 28

wide rays of light, all moving in the same direction

Front 29

Reflection

Back 29

bouncing off the surface of something

Front 30

luminous

Back 30

releasing its own light

Front 31

concave

Back 31

curved inwards

Front 32

Convex

Back 32

curved outwards

Front 33

Focal point

Back 33

the focus for a beam of light rays

Front 34

Image

Back 34

picture of an object

Front 35

Normal

Back 35

a line drawn perpendicular to the surface at the point where the light ray meets it

Front 36

Converging lens

Back 36

lens that bends light rays so that they move towards each other. Converging lenses are thicker in the middle than at the edges.

Front 37

Biconvex

Back 37

describes a convex lens with both sides curved outwards

Front 38

Biconcave

Back 38

concave on both sides

Front 39

Diverging lens

Back 39

lens that bends rays so that they spread out. Diverging lenses are thinner in the middle than at the edges.

Front 40

Ear canal

Back 40

the tube that leads from the outside of the ear to the ear drum.

Front 41

Ear drum

Back 41

the membrane in the middle of the ear, which vibrates in response to sound waves; the tympanic membrane.

Front 42

Auricle

Back 42

the fleshy outside of the eat

Front 43

Ossicles

Back 43

a set of three tiny bones that sends vibrations from the eardrum to the inner ear. They also make vibrations longer. (Hanner, anvil, stirrup)

Front 44

Oval window

Back 44

an egg-shaped hole covered with a thin-tissue. It is the entrance from the middle ear to the outer ear.

Front 45

Cochlea

Back 45

the snail shaped part of the inner ear. It is lined with tiny hairs that are vibrated by sound and stimulate the hearing receptors.

Front 46

Semi-circular canals

Back 46

three curved tubes, filled with fluid, in the inner ear that control your sense of balance.

Front 47

Medium

Back 47

material through which a wave moves

Front 48

Compression

Back 48

region in which the particles are further apart than when not disturbed by a wave

Front 49

Rarefraction

Back 49

region in which the particles are further apart than when not disturbed by a wave.

Front 50

Frequency

Back 50

number of vibrations in one second, or the number of wave lengths passing in one second

Front 51

Hertz

Back 51

unit of frequency. One hertz is equal to one vibration every second. (abbreviation: Hz

Front 52

Wavelength

Back 52

distance between two neighboring crests or troughs of a wave. This is the distance between two particles vibrating in step.

Front 53

Amplitude

Back 53

maximum distance that a particle moves away from its undisturbed position.

Front 54

Pitch

Back 54

highness or lowness of a sounds. The pitch that you hear depends on the frequency of the vibrating air.

Front 55

Transverse wave

Back 55

wave involving the vibration of particles perpendicular to the direction of the energy transfer

Front 56

Compression wave

Back 56

wave involving the vibration of particles in the same direction of energy tansfer

Front 57

Compression wave

Back 57

wave involving the vibration of particle in the same direction as energy transfer.