Y8 Phys T1-Light + Sound

Question 1

what is wavelength?

Answer 1

it is the distance between to peaks on a wave

Question 2

what is amplitude?

Answer 2

Amplitude is the height of a wave

Question 3

what are the 2 types of waves

Answer 3

transverse n longitudinal

Question 4

name the light wave and a sound wave

Answer 4

light wave-transverse
sound wave-longitudinal

Question 5

how to transverse and longitudinal oscillate?

Answer 5

transverse waves-90 degrees
longitudinal-same direction as the travel direction

Question 6

what are the secondary colours?

Answer 6

magenta,yellow n cyan

Question 7

what are the primary colours

Answer 7

red,green n blue

Question 8

what is refraction?

Answer 8

the way which light slows down and changes direction

Question 9

when do sound waves occur

Answer 9

when there is a disturbance in a solid,liquid or a gas.

Question 10

where can sound not travel

Answer 10

in space

Question 11

What two waves can waves behave?

Answer 11

reflection and refraction

Question 12

what happens when a sound wave reflects off a surface

Answer 12

we hear an echo

Question 13

what is specular reflection

Answer 13

lift reflects very uniform, off flat,shiny surfaces

Question 14

what is diffuse reflection?

Answer 14

dull,Uneven surfaces reflect the lights more unevenly

Question 15

What is the law of reflection?

Answer 15

When light reflects off a surface, the angle of incidence is always equal to the angle of reflection.The angles of incidence and reflection are measured from the normal line. This is an imaginary line at 90° to the surface.

Question 16

What happens when sound enters the ear?

Answer 16

Vibrates which passes onto the bones and causes them to vibrate. Those bones are connected to the vibrates and turns energy into electrical energy.

Question 17

What happens once the sound energy turns into electrical energy in the eardrum?

Answer 17

Electrical energy passes along the auditory nerve to the brain that interpret it as a sound

Question 18

What happens when people get older and need hearing aids?

Answer 18

The bends in the middle begins fuse this means louder sounds and he did to make them vibrate

Question 19

What can hearing aids help with?

Answer 19

They can help with amplifying sounds and retransmitting them

Question 20

What happens when a sound is made?

Answer 20

Particles, bunch up and spread out called compressions and rarefactions

Question 21

The greater the____ of the soundwave,the louder it is

Answer 21

Amplitude

Question 22

The higher the _____ of the same wave the higher is its pitch

Answer 22

Frequency

Question 23

What a very high pitches (over 20,000 Hz) called

Answer 23

ultrasound

Question 24

What’s a very low pitches(less then 20Hz) called?

Answer 24

infrasound

Question 25

What is refraction

Answer 25

when light passes from 1 substance to another and it changes its direction

Question 26

what is the light that combines all the colours

Answer 26

white

Question 27

what is on the electromagnetic spectrum

Answer 27

radio waves,microwave,infared,visible light,ultraviolet,x-rays,Gamma rays

Question 28

when the waves come in n out what is it called

Answer 28

in-compression
out-rarefaction

Question 29

how does sound travel?

Answer 29

in waves

Question 30

what do sound waves vibrate

Answer 30

air

Question 31

In the ear,what carries the electrical messages to the brain

Answer 31

auditory nerve