Doppler effect study guide

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Galaxies are redshifted and moving away from us

How does the Big Bang Theory explain observations of the Doppler effect in the universe?

wavelength

In the Doppler Effect Lab, we mostly observed changes in what?

low pitched

Long sound waves are

high pitched

Short sound waves are

true

The Doppler effect is seen when a wave-making source moves toward an observer.

true

The Doppler effect occurs when an observer moves away from a wave-making source.

true

The Doppler effect occurs when an observer moves towards a wave-making source.

red shifted

What do the light waves of a galaxy that is moving AWAY from us look like?

blue shifted

What do the light waves of a galaxy that is moving TOWARD us look like?

high pitched

When a car moves towards you, the sound of its horn seems relatively

high pitched

When an ambulance move TOWARD you it sounds ________ pitched.

low pitched

When the car moves AWAY from you, its horn seems

true

a higher frequency results when a wave source moves towards an observer

false

a moving wave source does not affect the frequency of the wave encountered by the observer

vector

acceleration

scalar

age

a line starting from the origin and goes up the graph and gradually starts to curve inward

d-t accelerating

a horizontal line going straight across the graph

d-t at rest

a line starting from the top of the graph and going down

d-t coming back

a diagonal line going up the graph

d-t constant speed

a line starting from the origin and goes up the graph and gradually starts to curve outward

d-t decelerating

vector

displacement

scalar

distance

scalar

energy

vector

force

low frequency

if the wave source is moving away from the observer it has ______________ frequency

high frequency

if the wave source is moving toward the observer it has ______________ frequency

true

it occurs when a wave source moves away an observer

scalar

mass

vector

momentum

red shift

moving away

lower frequency (red)

moving away (longer wavelength)

blue shift

moving closer

higher frequency (blue)

moving closer (short wavelength)

scalar

speed

normal frequency

standing still

normal spectrum

standing still

scalar

temperature

the Doppler effect

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

wave frequency

the changed pitch of the Doppler effect is due to changes in...

the man because it already passed the woman

the police car has passed the woman standing on the sidewalk, but has not yet passed the man. Which observer hears the siren at a higher pitch

scalar

time

a diagonal line going up the graph

v-t accelerating

a straight horizontal line on the x-axis

v-t at rest

horizontal line going across the graph

v-t constant speed

vector

velocity

vector

weight

pitch

which sound property describes how high or low a sound seems to a person


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