11.1 + 11.2 Progressive waves and wave properties

Question 1

what are progressive waves?

Answer 1

an oscillation that travels through matter (or in some cases vacums) that transfer energy from one place to another without transferring matter

Question 2

what is a longitudinal wave?

Answer 2

direction of energy transfer is parallel to oscillations

Question 3

what are transverse waves?

Answer 3

direction of energy transfer is perpendicular to oscillation

Question 4

what is the wave equation?

Answer 4

Question 5

what can be measured from distance displacement wave profiles?

Answer 5

• wavelength
• amplitude

snapshot of the wave

Question 6

what would a displacement distance wave profile look like for a transverse wave?

Answer 6

Question 7

what would a displacemnet distnace wave profile look like for a longitudinal wave?

how would you identify compressions and rarefactions?

Answer 7

centre of compression/ rarefaction has 0 displacement
* centre of compression: positive –> negative
* centre of rarefaction: negative–> positive

Question 8

How do you convert between radian and degrees?

Answer 8

360°= 2π radian
180°= π radian

Question 9

what is “phase difference”?

Answer 9

difference in radians between points on the same wave or similar points on two waves

measured in difference

Question 10

what is meant by the term “in phase”?

Answer 10

phase difference of 0 or a multiple of 2π radians (360°)

Question 11

what is meant by the term “antiphase”?

Answer 11

a phase difference of π radians (180°)

Question 12

what can be measured from a distplacment time wave profile?

Answer 12

• amplitude
• time period (frequency)

Question 13

define displacement

Answer 13

• distance and direction moved from the equilibrium position
• [s]
• units SI (m)

vector so negative or positive

Question 14

define Amplitude

Answer 14

• the maximum displacement from the equilibrium position
• [A]
• units SI (m)

vectors positive or negative

Question 15

define Wavelength

Answer 15

• the distance between two adjacent vibrating particles/points with same velocity, at same displacement
• [λ]
• units SI (m)

Question 16

define Time period

Answer 16

• the time taken for one oscillation/ wave to move one whole wavelength past a given point
• [T]
• units SI (s)

Question 17

define frequency

Answer 17

• the number of wavelengths passing a given point per second
• [f]
• units SI (Hz)

Question 18

define Wave Speed

Answer 18

• the distance travelled by the wave per unit of time
• [v]/[c]
• SI unit ms-1

Question 19

describe distance displacment graphs

Answer 19

• shows the displacement of several points on a wave at a particular time
• “snapshot”
• wavelength, amplitude

several particles

Question 20

describe displacemnt time graph

Answer 20

• shows the displacment of a point at several times
• “video of a single particle”

time period, frequnecy,amplitude

Question 21

Are these waves inphase, out of phase or Antiphase

Answer 21

In phase as everything is perfectly aligned

Question 22

How would you calculate if waves are in phase or anti phase according to wavelength ?

Answer 22

Question 23

How would you calculate if 2 waves are in phase or anti phase according to phase difference?

Answer 23

Question 24

What are the two types of waves and how do they specifically transfer energy?

Answer 24

Waves transfer energy via oscillations

Question 25

what is the phase of a point/particle?

Answer 25

the fraction of a complet cycle/ wave that a point is at

Question 26

Answer 26

Question 27

what is the phase difference between points P and Q?

Answer 27

Question 28

Progressive waves MCQ

Answer 28

Question 29

Answer 29

Question 30

Answer 30