Topic 5: Waves

Question 1

what is phase difference

Answer 1

The amount one wave lags behind another

Question 2

What is phase

Answer 2

A measure of a position of a certain point along a wave
(phase diff also counts as the distance between these points)

Question 3

What is a transverse wave

Answer 3

A wave in which the vibrations are perpendicular to the direction of travel

Question 4

What is a longitudinal wave

Answer 4

A wave in which vibrations are parallel to the direction of travel.

Question 5

What is amplitude

Answer 5

The Maximum Magnitude of displacement

Question 6

what is wavelength

Answer 6

The length of one whole wave cycle. e.g crest to crest or trough to trough.

Question 7

What is displacement

Answer 7

How far a point on a wave has moved from its undisturbed position

Question 8

what is the speed of light in air

Answer 8

3x10-8

Question 9

What is the Frequency

Answer 9

The number of cycles (vibrations)per second passing a given point

Question 10

What is the Unit and symbol for frequency

Answer 10

Hz
F

Question 11

What is the unit and symbol for wave speed

Answer 11

Ms^-1
V

Question 12

What is the unit and symbol for a Period

Answer 12

s T

Question 13

What is the unit and symbol for Wavelength

Answer 13

Meters
λ

Question 14

What is the Equation for Wave speed

Answer 14

V=f x λ

Question 15

Give 6 features of a wave

Answer 15

Absorption, Transmission,Reflection, Refraction,Interference,Diffraction

Question 16

Which two features of a wave provide evidence for the existence of Waves

Answer 16

Diffraction & Interference

Question 17

What is absorption

Answer 17

when energy is absorbed by an object

Question 18

Whats is transmission

Answer 18

when energy is transmitted from one source to another

Question 19

What is reflection

Answer 19

When a wave bounces of a surface

Question 20

What is refraction

Answer 20

When a Wave changes speed Because is enters a new medium

Question 21

What is interference

Answer 21

When 2 waves meet at the same point and adds displacement

Question 22

What is diffraction

Answer 22

When Waves spread Through a Gap

Question 23

Define intensity

Answer 23

How much energy a wave is carrying

Question 24

Define Superposition

Answer 24

When two or more waves pass through each other. The displacement of this overlap is the vector sum of two waves

Question 25

What is A Wave

Answer 25

When the vibration of a medium Travels but the medium itself Does not Travel

Question 26

Name the waves in the Electromagnetic spectrum in order of rising frequency falling wavelength.

Answer 26

radio waves, microwaves, infrared light, visible light, ultraviolet light, X-rays, and gamma rays.

Question 27

What type of wave are the waves in the electromagnetic spectrum.

Answer 27

Transverse waves

Question 28

What is total constructive interference

Answer 28

when two waves interfere they are amplified. where the path difference is a whole number due to the waves arriving in phase

Question 29

What is total destructive interference

Answer 29

when two waves interfere they are diminished .

Question 30

Define coherent

Answer 30

Sources that have the same wavelength and frequency and a fixed phase difference between them

Question 31

What is the maximum point in total constructive interference

Answer 31

The brightest point

Question 32

What is the minimum point in total Destructive interference

Answer 32

The darkest point

Question 33

What is the Equation for total Constructive interference

Answer 33

nλ

Question 34

What is the Equation for total Destructive interference

Answer 34

n+1/2 λ

Question 35

What is compression

Answer 35

Areas of High pressure in a longitudinal wave

Question 36

What is rarefaction

Answer 36

Areas of low pressure in a longitudinal wave

Question 37

How do you calculate the wavelength in a longitudinal wave

Answer 37

By finding the distance from either compression to compression of rarefaction to rarefacation

Question 38

What is the equation for phase difference

Answer 38

θ=2πx/λ

Question 39

what unit are we referring to when we talk about wave path

Answer 39

lander

Question 40

what unit are we referring to when we talk about wave Difference

Answer 40

pi

Question 41

Define a progressive wave

Answer 41

An oscillation that travels through matter transferring energy from one place to another but not transferring matter.

Question 42

Define a stationary wave

Answer 42

When to waves travelling in opposite directions waves reflects before they superimpose.

Question 43

Define a Node

Answer 43

When amplitude is equal to zero

Question 44

Define an Anti node

Answer 44

When amplitude is at the maximum

Question 45

What is the diffraction equation

Answer 45

d \sin \theta=n \lambda

Question 46

what is the pulse echo technique

Answer 46

A diagnostic technique that uses a short duration ultrasound pulses, transmitted to a place of interest causing echo signals which are detected and displayed.

Question 47

what is the pulse echo distance equation

Answer 47

X=Vt/2

Question 48

How is an image constructed using pulse echo

Answer 48

Using the energy transmitted back to the transducer

Question 49

What is the amount of energy refracted & transmitted dependent on

Answer 49

Density

Question 50

What sends out pulse in the ultrasound example

Answer 50

A Transducer

Question 51

What is the equation for fringe width

Answer 51

W= λD/s w= fringe width s= distance between slits D=distance between slits and screen λ=wavelength