Physics P6

Question 1

What are the two different types of waves?

Answer 1

Longitudinal
Transverse

Question 2

What are transverse waves like?
And example?

Answer 2

Vibrations are perpendicular to the direction of energy transfer
Electromagnetic waves

Question 3

What are longitudinal waves like?
An example?

Answer 3

The vibrations are in the same direction as the energy transfer
Ultrasound waves

Question 4

What is the difference between light and sound waves?

Answer 4

Sound is longitudinal
Light is transverse

Question 5

What is the speed of sound and light waves?

Answer 5

Sound is 330 m/s
Light is 300 million m/s

Question 6

What are the uses of radio waves?

Answer 6

Used mainly for communication
E.g. radio and tv signals

Question 7

What are the uses of microwaves?

Answer 7

Used for satellites and cooking
E.g. satellite tv and satellite phones

Question 8

What are the uses of infrared waves?

Answer 8

Can be used to cook and heat things
E.g. electric heaters, infrared cameras- create photos

Question 9

What are the uses of visible light waves?

Answer 9

Fibre optic cables use visible light to send data
E.g. send info to phones or computers

Question 10

What are the uses of ultraviolet waves?

Answer 10

Energy- efficient lights as uv radiation to produce visible light
E.g. gives a suntan

Question 11

What are the uses of x-ray

Answer 11

Used in medicine
E.g. creates x-ray images to check broken bones

Question 12

What are the uses of gamma waves?

Answer 12

Can kill cells- treat cancer

Question 13

What is the order of electromagnetic waves?

Answer 13

Radio
Microwaves
Infrared
Visible light
Ultraviolet
X-ray
Gamma

Question 14

What is the equation for working out wave speed?

Answer 14

Wave speed= frequency X wavelength

Question 15

Which EM waves are harmful?
How are they harmful?

Answer 15

EM radiation
UV
Gamma rays

UV damages surface cells
X-ray and gamma rays are types of ionising radiation