Understanding the Doppler Effect

What happens to the pitch of a car's horn as it moves away from you?

• The pitch fluctuates randomly.

• The pitch becomes lower.

• The pitch becomes higher.

• The pitch remains the same.

When a sound source moves towards you, what happens to the sound waves?

• They get compressed, resulting in a higher frequency.

• They disappear completely.

• They get stretched, resulting in a lower frequency.

• They remain unchanged.

What is the term used when sound waves are compressed, leading to a higher pitch?

• Red shift

• Green shift

• Blue shift

• Yellow shift

In the context of light, what does a red shift indicate about a celestial object's movement?

• The object is moving towards the observer.

• The object is stationary.

• The object is moving away from the observer.

• The object is spinning rapidly.

How do astronomers use the Doppler effect to study stars and galaxies?

• By calculating the distance from Earth.

• By analyzing the gravitational pull of the objects.

• By observing the color shift in the light from these objects.

• By measuring the temperature of the stars.