Waves

Question 1

List the 7 EM Waves in the correct order

Answer 1

1) Radio Waves
2) Micro Waves
3) Infra-Red
4) Visible Light
5) Ultra Violet
6) X-Rays
7) Gamma Rays

Question 2

Define refraction

Answer 2

The bending of a wave when it enters a medium where its speed is different.

Question 3

What happens when a wave crosses a boundary between two substances e.g from glass to air?

Answer 3

It bends (changes direction)

Question 4

What are sound waves caused by?

Answer 4

Vibrations.

Question 5

What type of wave does sound travel by?

Answer 5

Longitudinal waves.

Question 6

what units are used to measure wavelength

Answer 6

Meters

Question 7

What do EM waves with higher frequencies have?

Answer 7

Shorter wavelengths

Question 8

What is the use for a Radio Wave?

Answer 8

Radio Waves are mainly used for communication (e.g.. broadcasting)

Question 9

What is Infra-Red used for?

Answer 9

Infra-Red is used for remote controls and for police helicopters

Question 10

What is Ultra Violet used for?

Answer 10

Ultra Violet is used in sun beds

Question 11

Name a use for X-Rays

Answer 11

A use that X-Rays are used for is medical scanning (e.g. looking inside a humans body)

Question 12

Name a use for a Gamma Ray

Answer 12

Gamma rays are used for sterilising

Question 13

What are Micro Waves used for?

Answer 13

Micro Waves are used for cooking food and also used for mobiles

Question 14

What is Visible Light used for?

Answer 14

Visible Light is used for fibre-optic broadband

Question 15

what does frequency mean?

Answer 15

How many waves per second

Question 16

What is the equation to find the speed of a wave?

Answer 16

v=fxλ

Question 17

What is frequency measured in?

Answer 17

Hertz (Hz)

Question 18

What is the amplitude?

Answer 18

The difference from the equilibrium to the crest

Question 19

Name one of the difference between the transverse and longitudinal wave?

Answer 19

Transverse waves are perpendicular vibrations to the direction of energy transfer
Longitudinal waves vibrations are parallel

Question 20

Is this following statement true or false:

All waves can be reflected, refracted and diffracted

Answer 20

True

Question 21

What does this following equation mean:

v=fxλ

Answer 21

speed=frequency x wavelength

Question 22

What are the two types of waves?

Answer 22

Transverse and Longitudinal waves

Question 23

What is speed measured in?

Answer 23

Miles per second (m/s)

Question 24

Does Radio Waves have a long wavelength and low frequency or short wavelength and high frequency?

Answer 24

Radio Waves have a long wavelength and low frequency

Question 25

Does Gamma Rays have a short wavelength and high frequency or a long wavelength and low frequency?

Answer 25

Gamma Rays have a short wavelength and high frequency

Question 26

What is pitch

Answer 26

How high or low the sound is

Question 27

What is pitch affected by

Answer 27

Frequency

Question 28

What is the Doppler effect?

Answer 28

• When something emits waves moves towards you or away from you
• The frequency moves toward you and will seem higher and wavelength is shorter
• The frequency of a source moving away from you will seem lower and its wavelength will seem longer