Unit 1: Wave

Question 1

wave

Answer 1

a disturbance in space that transfers energy

Question 2

Mechanical Waves

Answer 2

waves that require a medium

Question 3

Types of Mechanical Waves

Answer 3

ocean, sound, etc.

Question 4

Electromagnetic Waves

Answer 4

waves that do not require a medium

Question 5

Types of Electromagnetic Waves

Answer 5

light, radio, microwaves, ultraviolet, gamma, etc.

Question 6

wave pulse

Answer 6

a short disturbance in a medium

Question 7

periodic wave

Answer 7

repeated disturbances in constant intervals

Question 8

What are the two types of waves

Answer 8

transversal and longitudinal

Question 9

Transversal

Answer 9

material vibrates up and down, wave energy moves left and right (perpendicular)

Question 10

Longitudinal

Answer 10

material and energy move in same direction (parallel)

Question 11

crest

Answer 11

high point of a wave

Question 12

trough

Answer 12

low point of a wave

Question 13

reflection (against a fixed point)

Answer 13

reflects 180°

Question 14

reflection (against a loose point)

Answer 14

doesn’t reflect (0°)

Question 15

amplitude

Answer 15

the maximum height of a wave from its equilibrium point (energy)

Question 16

wavelength

Answer 16

the length between two crests/two troughs (one crest and one trough), (λ)

Question 17

What is the equation for wavelength?

Answer 17

distance/# of waves

Question 18

period

Answer 18

the amount of time it takes to complete a single cycle (wave), (T)

Question 19

What is the equation for period?

Answer 19

T=1/f secs

Question 20

frequency

Answer 20

the amount of cycles per second (f)

Question 21

What is the equation for frequency?

Answer 21

f=1/T Hz

Question 22

speed (velocity)

Answer 22

how fast a wave moves

Question 23

What is the equation for speed?

Answer 23

v=fλ m/s

Question 24

Relationship between period and frequency

Answer 24

inverse

Question 25

Relationship between speed and frequency/wavelength

Answer 25

direct linear

Question 26

Is the speed of light or sound faster?

Answer 26

light

Question 27

phase

Answer 27

the offset of one point on a wave from another

Question 28

in phase

Answer 28

0° or 360°

Question 29

out of phase

Answer 29

180°, 90°, or 270°

Question 30

wave fronts

Answer 30

shows multiple waves in phase with each other (ripples in a pond)

Question 31

diffraction

Answer 31

when wave fronts move and bend through a barrier with an opening (smaller hole = more energy absorbed)

Question 32

Doppler Effect

Answer 32

the apparent change in frequency of a wave caused by motion between the source of the wave and the observer

Question 33

As a source moves towards the observer…

Answer 33

wavelength will decrease and frequency will increase

Question 34

As a source moves away from an observer…

Answer 34

wavelength will increase and frequency will decrease

Question 35

resonance

Answer 35

when a wave strikes an object with the same natural frequency, causes object to vibrate

Question 36

superposition

Answer 36

when two waves in the same medium move in opposite directions, when they meet only one wave will be visible

Question 37

constructive interference

Answer 37

when two waves in superposition are in phase, amplitudes will combine

Question 38

deconstructive inference

Answer 38

when two waves in superposition are out of phase 180°, amplitudes will cancel out

Question 39

standing wave

Answer 39

occurs when multiple pulses move through a medium at the same time

Question 40

antinodes (constructive)

Answer 40

points of maximum displacement

Question 41

nodes (deconstructive)

Answer 41

points that are on equilibrium

Question 42

In a standing wave, there will always be…

Answer 42

One less antinode per nodes

Question 43

3 nodes or 2 antinodes…

Answer 43

= 1λ