Waves - sound and light

Question 1

How does light travel

Answer 1

Light travels in transverse waves

Question 2

How does sound travel

Answer 2

Sound travels in longitudinal waves

Question 3

What is a wave

Answer 3

A wave is a vibration which transfers energy

Question 4

What are the three measurements of a wave

Answer 4

Amplitude, wavelength and frequency

Question 5

What does opaque mean

Answer 5

Opaque means you can’t see through it

Question 6

What does transparent mean

Answer 6

Transparent means you can see through it

Question 7

Name three things that produce light

Answer 7

Optional e.g sun, candle, light bulb, glow worms

Question 8

Name three things that reflect light

Answer 8

Everything other than luminous objects e.g the moon, planet and a human

Question 9

What travels fastest light or sound give one piece of evidence

Answer 9

Light travels fastest we know this because we see lightning before we hear it

Question 10

Why do we see things

Answer 10

Because light reflects of objects into our eyes

Question 11

What is refraction

Answer 11

Refraction is when the light bends because it has entered a different medium

Question 12

Does the light bend towards or away from the normal when it enters a more dense medium

Answer 12

The light bends towards the normal when it enters a more dense medium

Question 13

Why does light bend in refraction

Answer 13

The light bends because it’s speed changes

Question 14

What is reflection

Answer 14

Reflection is when a wave bounces off an o surface

Question 15

What does the angle of incidence equal when the light is reflected off of a mirror

Answer 15

Angle of reflection

Question 16

What do we call the incoming ray and out going ray in reflection

Answer 16

Incident ray and outgoing ray

Question 17

Draw a diagram showing where a fish would appear to be

Answer 17

The fish would appear to be higher in the water than it really is

Question 18

What are the three primary coulors

Answer 18

Red , green and blue

Question 19

What are the three secondary coulors

Answer 19

Yellow, cyan and magenta

Question 20

What color do you get when the three primary colours meet

Answer 20

White

Question 21

What colour would a red filter let through

Answer 21

Red

Question 22

Which colour has the longest wavelength

Answer 22

Red

Question 23

Which colour has the highest frequency

Answer 23

Violet

Question 24

Can sound or light travel through a vacuum, explain

Answer 24

Sound can not travel through a vacuum but light can. Sound needs particles to travel through where as light doesn’t

Question 25

Does sound travel fastest through air or water

Answer 25

Sound travels faster through water because the particles are more dense

Question 26

What determines the pitch of a sound

Answer 26

The frequency of the wave

Question 27

The higher the frequency the higher the what

Answer 27

Pitch

Question 28

What is the formulae for working out the speed of sound

Answer 28

Speed=distance/time

Question 29

What determines the loudness of a sound

Answer 29

Amplitude

Question 30

The higher the amplitude the louder the sound/true or false

Answer 30

True

Question 31

Draw four wave forms for the following sounds: a loud sound, a quiet sound, a high pitched sound and a low pitched sound

Answer 31

Get someone to check

Question 32

Draw a diagram of a periscope

Answer 32

Get someone to check