Quiz about Lesson on Doppler Effect

Question 1

Long sound waves are...

Accepted Answer

low pitched

Answer

high pitched

Answer

medium pitched

Question 2

Short sound waves are...

Accepted Answer

high pitched

Answer

low pitched

Answer

medium pitched

Question 3

When the car moves AWAY from you, its horn seems...

Accepted Answer

Low pitched

Answer

High pitched

Answer

Normal

Question 4

When an ambulance move TOWARD you it sounds ________ pitched.

Accepted Answer

high

Answer

low

Answer

medium

Question 5

What can you tell about this object's motion?

Accepted Answer

Moving to the East (right).

Answer

Moving to the North (up).

Answer

Moving to the South (down).

Answer

Moving to the West (left).

Question 6

What can you tell about the motion of this object?

Accepted Answer

Standing still.

Answer

Moving left.

Answer

Moving right quickly.

Answer

Moving up slowly.

Question 7

What direction is this object moving?

Accepted Answer

right

Answer

left

Answer

up

Answer

down

Question 8

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

Accepted Answer

blue shifted

Answer

red shifted

Answer

green shifted

Answer

yellow shifted

Question 9

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

Accepted Answer

red shifted

Answer

blue shifted

Answer

green shifted

Answer

yellow shifted

Question 10

The vast majority of galaxies in our universe are moving away from us.  We know this because we observe __________ in the galaxies absorption spectra.

Accepted Answer

Redshift

Answer

Blueshift

Answer

Turbulance

Answer

Superposition

Question 11

Use the image to identify the motion of the object relative to Earth.  Compare the absorption spectra of the star to what the star would look like if it were not moving at all relative to Earth.

Accepted Answer

It is moving towards Earth (Blueshift)

Answer

It is not moving relative to Earth

Answer

It is moving away from Earth (Redshift)

Answer

It is moving towards Earth (Redshift)

Question 12

Use the image to identify the motion of the object relative to Earth.  Compare the absorption spectra of the star to what the star would look like if it were not moving at all relative to Earth.

Accepted Answer

It is moving away from Earth (Redshift)

Answer

It is not moving

Answer

It is moving towards Earth (Blueshift)

Answer

It is moving towards Earth (Redshift)

Question 13

Use the image to identify the motion of the object relative to Earth.  Compare the absorption spectra of the star to what the star would look like if it were not moving at all relative to Earth.

Accepted Answer

It is not moving relative to Earth

Answer

It is moving away from Earth (Redshift)

Answer

It is moving towards Earth (Blueshift)

Answer

It is moving towards Earth (Redshift)

Question 14

Which discovery(ies) came from our understanding redshift/ blueshift?

Accepted Answer

All of the above (and many more)

Answer

The universe is expanding

Answer

Most galaxies are moving away from us

Answer

Andromeda galaxy will collide with the Milky way in 3.75 billion years

Question 15

What is the Doppler effect?

Accepted Answer

The observed change in frequency of sound or light because of the relative motion of a wave source and the observer.

Answer

The observed change in amplitude of sound or light because of the relative motion of a wave source and the observer.

Answer

The observed change in wave speed of sound or light because of the relative motion of a wave source and the observer.

Answer

The observed change in equilibrium position of sound or light because of the relative motion of a wave source and the observer.

Lesson on Doppler Effect

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