Sound And Light Flashcards Preview

Science Year 7 > Sound And Light > Flashcards

Flashcards in Sound And Light Deck (32):
1

Plane mirror

A mirror with a flat reflective surface

2

Specular reflection

A exact reflection image

3

Refraction

The bending of light waves when they slow down when they go through a different medium example through glass.

4

Diffuse scattering

Reflection from a rough surface

5

Law of reflection

The law of reflection says that the incident ray is always equal to the ray of reflection.

6

Reflected ray

The reflected ray is the ray of light that is reflected from the mirror , it is always equal to the ray of incidence.

7

Refracted ray

The refracted ray is the ray that is refracted.

8

Angle of refraction

The angle made by the refracted ray

9

Medium

Any substance eg: air, glass ect

10

Cornea

The cornea is the piece of skin protecting the pupil and the lens.

11

Lens

The lens is the part in your eye which is see through, the image is upside down but your brain flips it round.

12

Retina

The part in your eye which sees colour

13

Convex lens

A lens that converges the image, you use it when you are long sited

14

Concave lens

A lens that diverges the image, you use it when you are short sited

15

Dispesion

The dispersal ( splitting ) of white light into colours of the spectrum. This is due to the reflection in which each colour travels at different speeds.

16

Spectrum

The dispersion of white light into all colours that create it.

17

Wave

An oscillation that transfers energy

18

Peak/crest

The highest point in a wave

19

Oscillation

The movement up and down in a wave

20

Pitch

The pitch is determined by frequency

21

Amplitude

How loud it is or how far the peak or the trough is from the middle

22

Frequency

How many waves go past a point in a second

23

Wave length

The distance between two waves

24

Transverse wave

In a transverse wave the oscillation is at 90 degrees to the direction of the wave

25

Longitudinal wave

In longitudinal waves they move parallel to the direction of the wave

26

Speed of light

The speed of light is 299 792 458 m / s

27

The speed of sound

The speed of sound is 343 m / s in dry air
The speed in water is 1450-1498 m / s
The speed in steel is 5920 m / s

28

The audible range

The audible range is how loud or quiet you can hear

29

Vacuum

A vacuum is when their is no particles in somewhere for example space

30

Ultra sound

Ultrasound is any sound above 20,000 Hz ( above the human audible range of hearing )

31

Echo

An echo is a reflected sound wave caused by reverberation

32

Reverberations

A reverberation is caused by a reflected sound