Waves 1

Question 1

What do waves do?

Answer 1

Waves carry energy and information (but not matter)

Question 2

How are waves measured?

Answer 2

An oscilloscope

Question 3

What is frequency measured in?

Answer 3

Hertz (Hz)

Question 4

How do you work out wavespeed?

Answer 4

Wavespeed = Frequency x Wavelength (V = Fλ)

Question 5

How do you work out the frequency of a wave?

Answer 5

Frequency = 1/Time period (T)

Question 6

True or False all waves can be reflected and refracted

Answer 6

True

Question 7

What are the uses of radio waves?

Answer 7

Broadcasting and communications

Question 8

What are the uses of microwaves?

Answer 8

Cooking and satellite transmitions

Question 9

What is the use of gamma rays?

Answer 9

Sterilising food and medical equipmentm

Question 10

What is the use of X - rays?

Answer 10

observing the internal structure of objects

Question 11

What is the use of ultra-violet rays

Answer 11

used to make fluorescent things and can find back note forgery

Question 12

what is the use of infrared rays

Answer 12

heaters and night vision

Question 13

what is the use of visible light?

Answer 13

optical fibres and photography

Question 14

how can microwaves harm you?

Answer 14

internal heating of body tissue

Question 15

how can infrared harm you?

Answer 15

skin burns

Question 16

how can ultraviolet harm you?

Answer 16

damage to surface cells and blindness

Question 17

In what direction does a transverse wave move?

Answer 17

Perpendicular to the direction of energy transport

Question 18

what is an example of a transverse wave?

Answer 18

light waves

Question 19

In what way does a longitudinal wave move?

Answer 19

Parallel to the direction of the energy transport

Question 20

what is an example of a longitudinal wave?

Answer 20

a sound wave

Question 21

what does the angle of incidence equal?

Answer 21

the angle of reflection

Question 22

what is the frequency range of a human

Answer 22

20 - 20,000 Hz