Physics 6: Waves

Question 1

What is the amplitude of a wave?

Answer 1

Vertical distance

Question 2

What is the wavelength ?

Answer 2

Horizontal distance 
(remember pick the same point on two adjacent waves)

(Meters)

Question 3

What do we call the highest point on a wave

Answer 3

Peak

Question 4

What do we call the lowest point of a wave

Answer 4

Trough

Question 5

What is the frequency?

Answer 5

Number of waves in 1 second

Hz

Question 6

What is a period

Answer 6

Amount of time it takes for 1 wave to form

1/frequency

Question 7

What is the formula for velocity of wave (wave speed)

Answer 7

Frequency x Wavelength

Question 8

State 2 differences between a transverse and longitudinal wave

Answer 8

Transverse waves:

• Displacement of wave is perpendicular to the direction of the wave
• Do not need particles to travel

Longitudinal waves:

• Displacement of wave is parallel to the direction of the wave
• Do need particles to travel

Question 9

Examples of transverse waves

Answer 9

Electromagnetic waves

Question 10

Examples of longitudinal waves

Answer 10

Sound

Question 11

State the electromagnetic waves in order

Answer 11

Radiowaves
Microwaves
Infrared 
Visible light
Ultra violet
X-ray
Gamma rays

Question 12

State the use of radiowaves

Answer 12

In radio

Question 13

State the use of microwaves

Answer 13

In microwaves to heat up food

Question 14

State the use of infrared

Answer 14

Infrared cameras

TV remotes

Question 15

Use of ultraviolet

Answer 15

Tanning beds

Question 16

Uses of X-rays

Answer 16

Take pictures of bones

CT scan

Question 17

Uses of gamma rays

Answer 17

Used in radiotherapy

Used to sterilise fruit + veg + medical equipment