Doppler Shift

What best describes the doppler effect?

• An apparent change in frequency of a wave due to the relative motion between a wave source and an observer

• When sound changes pitch

• When light changes color

• An apparent change in the amplitude of a wave due to the relative motion between a wave source and an observer.

Tags

NGSS.HS-PS4-1

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.

• It is not moving

• It is moving away from Earth (Redshift)

• It is moving towards Earth (Blueshift)

• It is moving towards Earth (Redshift)

Tags

NGSS.HS-PS4-3

Based on  Doppler effect, which of the galaxies is moving away from Earth?

• A

• B 

• C

• A and B

Tags

NGSS.HS-ESS1-2

Is the Galaxy moving

• Away

• Towards

• Stationary

Tags

NGSS.HS-ESS1-2

In a pitch-black night, you hear a police siren is getting higher and higher, could you tell if the car is coming toward you or driving away from you?

• coming toward you

• away from you

• going circles around you

• parking still

Tags

NGSS.HS-PS4-1

Are any of the galaxies moving towards Earth?  Explain.

• A.  It is redshifted

• B. It is redshifted.

• C. It is blue shifted.

• A. It is blueshifted.

Tags

NGSS.HS-ESS1-2

In red shift, the wavelengths of light become

• Bluer

• shorter

• longer

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Some people in moving cars are shining flashlights on you. All of the flashlights are normally green. One of them looks red to you, the other looks violet. Which statement is true?

• The red and violet one are both moving away from me.

• The red and violet one are both moving towrads me.

• The red one is moving away from me, the violet one is moving towrads me.

• The red one is moving towrads me, the violet one is moving away from me.

Tags

NGSS.HS-PS4-1

Now, same situation, two people in cars are shining flashlights at you, which are normally green. One of them appears yellow, the other one appears red. Which statement is true.

• The red one is moving faster away from me.

• The yellow one is moving faster away from me.

• The red one is moving faster towards me.

• The yellow one is moving faster towards me.

Tags

NGSS.HS-PS4-1

Now, same situation, two people in cars are shining flashlights at you, which are normally green. One of them appears blue, the other one appears violet. Which statement is true.

• The blue one is moving faster away from me.

• The violet one is moving faster away from me.

• The blue one is moving faster towards me.

• The violet one is moving faster towards me.

Tags

NGSS.HS-PS4-1