Wave Properties Year 9

Question 1

What are transverse waves?

Answer 1

Waves that have vibrations that travel perpendicular to direction of energy transfer

Question 2

What are longitudinal waves?

Answer 2

Waves with vibrations that travel parallel to direction of energy transfer

Question 3

Can transverse waves travel through a vacuum?

Answer 3

Yes

Question 4

Can longitudinal waves travel through a vacuum?

Answer 4

No

Question 5

What do transverse waves consist?

Answer 5

Peaks and troughs

Question 6

What do longitudinal waves consist?

Answer 6

Compressions

Question 7

Name a type of transverse wave

Answer 7

Water ripples

Question 8

Name a type of longitudinal waves

Answer 8

Sound waves

Question 9

What is displacement?

Answer 9

Distance of a certain point in the medium that has moved from its rest position

Question 10

What is a rest position?

Answer 10

Position of a particle when it is not vibrating

Question 11

What is amplitude?

Answer 11

Maximum displacement of a certain point

Question 12

What is a wavelength?

Answer 12

Distance of a point from one wave to its equivalent point on the adjacent wave

Question 13

What is frequency?

Answer 13

Number of waves passing a point per second

Question 14

What is a time period?

Answer 14

Period of time a wave takes to complete one full cycle

Question 15

What is the formula to find time period?

Answer 15

Period= 1/frequency

Question 16

What is wave speed?

Answer 16

Speed at which energy transfers/moves through medium

Question 17

What is the formula for wave speed?

Answer 17

Frequency x Wavelength

Question 18

What is the formula for frequency

Answer 18

Wave speed/wavelength or 1/Time Period

Question 19

What is wave reflection?

Answer 19

When a wave encounters a boundary between 2 different mediums and bounces back to original medium

Question 20

What is the angle of reflection?

Answer 20

Angle at which wave bounces back

Question 21

What is the angle of incidence?

Answer 21

Angle at which wave hits boundary

Question 22

What is the relation between the angle of incidence and angle of reflection?

Answer 22

They are equal

Question 23

What is refraction?

Answer 23

Wave changing speed, maybe direction, after entering a denser/less dense medium

Question 24

What is relation between density of medium and speed of light when passing through the medium?

Answer 24

Denser the material the slower light travels through it

Question 25

Describe path of light during refraction

Answer 25

TAGAGA-Towards normal, first medium to second medium, away from normal, second medium to first medium

Question 26

What must both mediums be for refraction to take place?

Answer 26

Transparent

Question 27

Name the colours in the visible light spectrum

Answer 27

Red, Orange, Yellow, Green, Blue, Indigo, Violet

Question 28

What does every colour in the light spectrum have?

Answer 28

Narrow band of wavelength and frequency

Question 29

What is specular reflection?

Answer 29

Reflection from a smooth surface in a single direction

Question 30

What is diffused reflection?

Answer 30

Reflection from a rough surface, causing scattering

Question 31

What is the relation between the wavelength of colours and how much they refract

Answer 31

The shorter the wavelength, the more they reflect

Question 32

What determines colour of an object

Answer 32

Which wavelengths of light are reflected the strongest

Question 33

What happens to wavelengths that aren't reflected by an object

Answer 33

They are absorbed

Question 34

What colour does an object appear as if all of its wavelengths are reflected equally?

Answer 34

White

Question 35

What colour does an object appear if all its wavelengths are absorbed?

Answer 35

Black