Elias P.S. Waves Test Review

Define Wave

distance caused by a vibration that moves energy across a distance

Define Vibration

repetitive up/down or side/side motion

Define Medium

the material in which a waves travels

True/False: A medium moves with the wave

False

What type of wave does not require a medium

light waves

What types of waves does the medium move at right angles to the direction of the wave

Transverse Waves

What is the HIGH point of the wave called

crest

What is the LOW point of the wave called

trough

What type of wave does the medium move parallel to the direction of the wave

longitudinal waves

What is a compression

compacted points

What is a rarefraction

stretched out points

What type of wave does the medium move in a circular motion in the direction of the wave

surface wave

What type of wave is a combination of transverse and longitudinal waves

surface waves

Where do surface waves generally occur

an edge between 2 different media

What is the maximum distance a particle in a medium move from rest when disturbed by a wave called?

amplitude

what amplitude do have energy waves have

high amplitude

define wavelength

distance between repeating parts of a wave

define frequency

the number of waves that pass a certain point per time

define reflection

a wave bouncing back from a surface it cannot pass

What is the angle of incidence?

angle formed between incident waves and normal waves

What is the angle of reflection?

angle formed between reflected waves and normal waves

Define Refraction

bending of a wave when it moves from 1 medium to another

Define diffraction

bending of a wave when it passes through a small space or moves around a barrier

what is interference

when any 2 or more waves meet and affect one another

Define constructive interference

2 waves make 1 wave with a larger amplitude

Define destructive interferece

2 waves make 1 wave with a smaller amplitude

Define standing wave

a wave that appears to not move

what is a node?

where the amplitude equals 0

What is an antinode

the crests and troughs of a wave

What type of wave does NOT require a medium

light waves

What types of waves are sound waves

longitudinal waves

What type of medium do sound waves travel best?

Solids (then liquids)

What is the speed of sound?

342 m/s

What is supersonic?

faster than the speed of sound

What is the pitch of sound called?

Frequency

What is the range the human ear can hear?

20-20,000 Hz

Define the Doppler Effect

the change in pitch of a sound when the source of the sound is in motion

How does the pitch change as it comes towards you?

it gets higher

How does the pitch change as it goes away from you?

it gets lower

Define Intensity

the amount of energy a sound wave carries per second in a certain area

How does higher intensity affect volume of sound?

the higher the intensity, the higher the volume.

What is loudness measured in?

decibels (dB)

Define Resonance

when an object and sound wave have the same frequency

What are electromagnetic (EM) waves?

magnetic and electric waves traveling together

True/False: EM waves do NOT need a media

True

What type of waves are light waves?

transverse waves

Light is considered to be a wave and what else?

Particle (photon)

In what type of media does light travel best?

gases

What is the speed of light

3x10^8 m/s

What causes different colors of light?

different objects appear certain colors depending on which wavelengths they reflect and absorb