Chapter 1 B

Question 1

Wavelength is determined by

Answer 1

wavelength of a wave as a result of the velocity (determined by the medium through which
it travels) and the frequency (determined by the source)

Question 2

Amplitude meaning

Answer 2

Maximimum displacement from neutral point of a wave

Question 3

Displacement
Frequency
Period
Meaning

Answer 3

displacement the change in position of an object (vector quantity) frequency the number of cycles completed per unit of time
period the time taken to complete one cycle

Question 4

Wave cycle
Wavelength
Wave speed
Meaning

Answer 4

wave cycle the process of a wave completing one full oscillation, ending up in a final
configuration identical to the initial configuration
wavelength the distance covered by one complete wave cycle
wave speed the speed at which a wave transfers its energy through a medium

Question 5

Wave equation (period v frequency)

Answer 5

Period: v= wavelength/T
Frequency: v= f/ wavelength

Question 6

Properties of a wave

Answer 6

Amplitude wavelength period and frequency
Used to describe wave behaviour

Question 7

Units for properties of waves

Answer 7

Wavelength: m
Amplitude: m or Pa
Period: s
Frequency: hz or s^-1
V: ms^-1

Question 8

Wavelength of light

Answer 8

Usually in nanometers nm
Represents one billionth (10^9 ) of a m

Question 9

Relationship between frequency and period

Answer 9

Inversely proportional, if frequency doubles then period will half.

Question 10

Energy relationship with amplitude and speed

Answer 10

Increases if amplitude and speed increase

Question 11

What does amplitude in electromagnetic waves tell us

Answer 11

The intensity and brightness of the light.

Question 12

What does frequency and amplitude tell us for sound waves

Answer 12

Frequency is pitch amplitude is volume.

Question 13

What determines speed frequency and wavelength

Answer 13

S: physical properties of a medium through which a wave travels
F: source of the wave
W: relationship to frequency and wave speed through the wave equation

Question 14

Changing speed and frequency

Answer 14

Determined by external factors, they need to change to change them.

Question 15

Sound and electromagnetic waves through different materials (worst to best)

Answer 15

S: steel, water, air at high altitude, air
E: diamond, glass, water, nothing or vacuum.

Question 16

How does source determine frequency

Answer 16

Wave frequency will be determined by how fast the source of the wave is vibrating/oscillating. The faster the source is vibrating the higher the frequency of a wave. Take sound for example, a speaker vibrating slower will produce a sound at a lower frequency. Light is another example, the faster an atom vibrates, such as when it gets hotter, the higher the frequency electromagnetic wave it will produce.

Question 17

Faster the source vibrates…

Answer 17

The higher the frequency and the lower the period

Question 18

How do speed and frequency determine wavelength

Answer 18

Through the formula
V= f times wavelength

Question 19

What different graphs show

Answer 19

Distance:
Graphs showing the wave at a single point in time will have distance as its horizontal axis.
ƒ Such graphs are used to find wavelength and amplitude.
Time:
– Graphs showing a particle in the wave over a period in time will have time
as its horizontal axis.
ƒ Such graphs are used to find period, frequency, and amplitude.

Question 20

What does increasing amplitude do

Answer 20

Increase brightness or volume

Question 21

Sound (mechanical) and light (em) amplitude and frequency

Answer 21

S: a=volume f=pitch
L: a=brightness f=colour

Question 22

Formula for f and relationship between f wavelength and v

Answer 22

V
F wavelength
Or
F= 1divide t

Question 23

What is wavelength and speed dependent on v frequency

Answer 23

W and speed: medium
F: wave source
Frequency doesn’t change if we slow doen as frequent per second doesn’t change

Question 24

Relationships

Answer 24

Long wavelength
Low f
Low energy

Short wavelength
High f
High energy

Question 25

:what does f equal in a worded equation v speed

Answer 25

F: waves per second = waves divide seconds
S: distance divide time

Question 26

Does wavelength effect speed

Answer 26

No