11.1-11.5 Waves 1 Quizlet Cards

Question 1

What is a progressive wave?

Answer 1

A progressive wave that transfers energy through space.

Question 2

What is a transverse wave?

Answer 2

A wave in which the oscillations are perpendicular to the direction of wave propagation

Question 3

What is a longitudinal wave?

Answer 3

A wave in which the oscillations are parallel to the direction of wave propagation

Question 4

Give an example of a longitudinal wave

Answer 4

Sound, primary seismic waves

Question 5

Give an example of a transverse waves

Answer 5

Waves on a stretched string, secondary seismic waves, electromagnetic radiation

Question 6

What are the regions of high pressure in a longitudinal wave called?

Answer 6

Compression

Question 7

What are the regions of low pressure in a longitudinal wave called?

Answer 7

Rarefaction

Question 8

What is the displacement of a wave?

Answer 8

The distance of a particle in the medium from it’s equilibrium position in a particular direction.

Question 9

What is the equilibrium position in wave motion?

Answer 9

The position of the medium when undisturbed by a wave.

Question 10

What is the amplitude of a wave?

Answer 10

Maximum displacement of the medium from the equilibrium position.

Question 11

What is the frequency of a wave?

Answer 11

The number of wave cycles per second OR the number of waves passing a point per unit time

Question 12

What is the time period of a wave?

Answer 12

Time taken for one complete oscillation OR time for a whole wavelength to pass a fixed point.

Question 13

What is the relationship between frequency and time period?

Answer 13

f = 1/T or inverse proportionality

Question 14

How many radians of phase are there in one complete wave cycle?

Answer 14

2π rad

Question 15

What term describes a phase difference of zero between two points on a wave?

Answer 15

In phase

Question 16

What term describes a phase difference of pi radians between two points on a wave?

Answer 16

In anti phase

Question 17

What is the phase difference between points half a wavelength apart?

Answer 17

180 degrees OR π rad

Question 18

What is the phase difference between points quarter of a wavelength apart?

Answer 18

90 degrees OR π/2 rad

Question 19

What is an oscillation?

Answer 19

A displacement one way and then the other about an equilibrium position.

Question 20

What is diffraction?

Answer 20

The spreading out of waves after passing through a slit/around an obstacle.

Question 21

What effect does reducing the size of a single slit have on diffraction?

Answer 21

Diffracted waves spread out more

Question 22

What is the effect of decreasing the wavelength on diffraction?

Answer 22

Diffracted waves spread out less

Question 23

What is meant by the intensity of a wave?

Answer 23

Intensity is the energy delivered by the wave per second per square metre normal to the wave

Question 24

How is the intensity of a wave related to the amplitude?

Answer 24

Intensity is proportional to amplitude squared.

Question 25

How does intensity vary with distance from a point source of waves?

Answer 25

Inverse square law or I = P / 4πr²

Question 26

What is a mechanical wave

Answer 26

A wave that requires a medium.