P1.5 Waves

Question 1

<p>What is wavelength?</p>

Answer 1

<p>The distance between two points on a wave (The same point)</p>

Question 2

<p>what is frequency?</p>

Answer 2

<p>number of waves per second (Hz)</p>

Question 3

<p>what are longitude waves?</p>

Answer 3

<p>Sound waves and waves in a stretched spring</p>

Question 4

<p>what are transverse waves?</p>

Answer 4

<p>Light and other types of electromagnetic radiation </p>

Question 5

what is the electromagnetic spectrum

Answer 5

The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation

Question 6

<p>what is amplitude</p>

Answer 6

<p>the maximum height of a wave from the middle of the wave to its crest or through</p>

Question 7

<p>what is pitch</p>

Answer 7

<p>the frequency of a sound. sounds with a high pitch have a high frequency.</p>

Question 8

what is duration

Answer 8

the duration of the sound

Question 9

what is loudness

Answer 9

whether its loud or quiet

Question 10

what are light waves

Answer 10

the waves of light that travel to a certain place.

Question 11

What is a transverse wave?

Answer 11

A wave which has vibrations perpendicular (90 degrees) to their direction of travel.

Question 12

What is a longitudinal wave?

Answer 12

A wave which has vibrations that are parallel to their direction of travel.

Question 13

what is the a example of a longitudinal wave?

Answer 13

sound wave

Question 14

waves transfer…..?

Answer 14

Energy without transferring any matter.

Question 15

what is wavelength measured in

Answer 15

metres

Question 16

what does it mean that the frequency of a wave is 25 hertz

Answer 16

there are 25 waves per second

Question 17

how do you calculate speed of a wave?

Answer 17

frequency X wavelength

Question 18

what is meant by diffraction?

Answer 18

The spreading out of waves when they pass through a gap or an obstacle

Question 19

what is refraction?

Answer 19

when a wave changes direction as it hits the boundary between two different media

Question 20

what is the name given to a reflected sound wave?

Answer 20

echo

Question 21

what similar properties do EM waves have?

Answer 21

can be reflected
can travel through a vacuum
can be refracted

Question 22

what is speed measured in?

Answer 22

m/s

Question 23

what is frequency measured in?

Answer 23

Hz

Question 24

what is wavelength measured in?

Answer 24

M

Question 25

the reflection of light allows us to?

Answer 25

see objects as light bounces off them into your eyes

Question 26

the angle of incidence ALWAYS EQUALS?

Answer 26

the angle of reflection

Question 27

what uses do infrared waves have?

Answer 27

remote controls

Question 28

what uses to microwaves have?

Answer 28

mobile phones

Question 29

what waves are in the electromagnetic spectrum?

Answer 29

Radio, microwave, infared, visible light, ultraviolet, x rays and gamma rays

Question 30

EM waves with higher frequencies have...?

Answer 30

shorter wavelengths

Question 31

does the wave length get bigger or smaller as you go down the spectrum?

Answer 31

smaller

Question 32

why are radio waves used for communication?

Answer 32

-long waves, can diffract around curves of the earth

Question 33

waves are only refracted when?

Answer 33

they meet a new medium at an angle

Question 34

why are microwaves used to satellite communication?

Answer 34

- they can pass through the earths watery atmosphere - radio waves can't - signal is transmitted to space and picked up by a satellite and transmitted back to a satellite dish on the earth

Question 35

what does sound travel as?

Answer 35

a wave

Question 36

why can't sound travel in space?

Answer 36

because it's a vacuum- got no particles to pass the vibration

Question 37

why do you hear a delay between the original sound and the echo?

Answer 37

because echoed sound waves have to travel further so it takes longer to reach your ears

Question 38

how may Hz in a kHz?

Answer 38

1000

Question 39

a high frequency or high pitch also means a?

Answer 39

shorter wavelength

Question 40

what is the doppler effect?

Answer 40

the frequency of a source moving towards you will seem higher and it's wavelength will seem shorter. the frequency of a source moving away will seem lower and it's wavelength will seem longer.