Transverse waves and pulses

Question 1

Definition of Medium

Answer 1

Substance/material through which a pulse/wave will move.

Question 2

What carries the pulse from one place to the other? But doesn’t create and isn’t the pulse?

Answer 2

Medium

Question 3

Definition of a pulse?

Answer 3

Single disturbance that moves through a medium.

Question 4

Definition of Amplitude and its unit of measurement

Answer 4

Measurement of how far the medium is displaced from its rest position.
Measured in metres (m)

Question 5

Another term for the mediums rest position

Answer 5

Equilibrium

Question 6

Term for this definition:

Measurement of how long the pulse is.

Answer 6

Pulse length

Question 7

Term for this definition:
Distance a pulse travels per unit time.
Also give relative equation

Answer 7

Pulse speed
v=D/t
(Distance divided by time)

Question 8

In a transverse pulse/wave the displacement of the medium is ………. to the direction (………) of the pulse/wave.
Give a synonym for the direction of the movement of the pulse/wave.

Answer 8

Perpendicular

Propagation

Question 9

What two different types of Reflections can a pulse encounter as it hits an object?
Describe what happens.

Answer 9

Fixed-end Reflection.
Pulse inverts itself. Travels back to source. Fixed end will absorb some energy.

Free-end Reflection/Loose end Reflection.
Does not invert. Free-end doesn’t absorb as much energy.

Question 10

Definition of a superposition

Give the two possible examples

Answer 10

When two disturbances occupy the same space at the same time.
Constructive interference.
Destructive interference.

Question 11

A superposition when two pulses are in the same medium.

A superposition when two pulses are in different mediums.

Answer 11

Constructive interference. (Same medium, amplitude is the sum of the two pulses)

Destructive interference. (Different mediums, the biggest pulse cancels the smaller pulse)

Question 12

Definition of a trough and a crest

Answer 12

Trough: pulse moving below the medium
Crest: pulse moving above the medium

Question 13

What do you call the pulse that moves above and the pulse that moves below the medium?

Answer 13

Crest and Trough

Question 14

Definition of a wave

Answer 14

Consists of a train of pulses. The periodic, continuous disturbance of a medium.

Question 15

Term for: And unit:

Time taken for two successive crests/troughs to pass a fixed point. (One wavelength)

Answer 15

Period (T)

Measured in seconds (s)

Question 16

Definition of a Period?

Answer 16

The time taken for two successive crests/troughs to pass a fixed point. (One wavelength)

Question 17

Definition of a wavelength of a wave

Answer 17

Distance between any two adjacent points that are in phase.
Unit is Landa
Measured in metres (m)

Question 18

Give the term for this definition: It’s unit: What it’s measured in:
Distance between any two adjacent points that are in phase.

Answer 18

Wavelength of a wave
Unit is Landa
Measured in metres (m)

Question 19

Definition for Frequency

What is it measured in?

Answer 19

The number of successive crests/troughs that pass a given point in a second. 
Unit (f) 
Measured in (Hz) Hertz

Question 20

Equation to find out Period if you have the frequency.

Answer 20

f= 1/T

1 divided by T

Question 21

Equation for Frequency if you have the Period.

Answer 21

T=1/f

Question 22

Definition of speed

Answer 22

Lightning Mc Queen ;-)

The distance something travels per unit time. (v)
Measured in m.s-1

Question 23

What are all the equations for speed?

Answer 23

v=f x Landa or
v= distance/time or
v=Landa/T = Landa/Period

Question 24

Do all waves have the same properties?

Answer 24

Yes