Doppler Effect

Mr. Anderson explains the Doppler Effect, illustrating how sound, water, and light waves change frequency due to motion. He discusses the effect of movement on wave frequency, using real-world examples like sirens and cars. The video also covers Hubble's redshift discovery, indicating the universe's expansion. The lesson concludes with a focus on wavefront diagrams to visualize these concepts.

What happens to the pitch of a siren as it moves towards you?

• The pitch fluctuates randomly.

• The pitch decreases.

• The pitch remains constant.

• The pitch increases.

What did Edwin Hubble discover about light from distant galaxies?

• It remains unchanged.

• It shifts towards the blue.

• It becomes invisible.

• It shifts towards the red.

How does the frequency of waves change when the source moves towards an observer?

• The frequency remains the same.

• The frequency increases.

• The frequency decreases.

• The frequency becomes zero.

What effect does the movement of the observer have on the frequency of waves?

• It can either increase or decrease the frequency.

• It increases the frequency.

• It decreases the frequency.

• It has no effect.

When moving with the waves, how does the frequency experienced by the observer change?

• It becomes unpredictable.

• It increases.

• It decreases.

• It remains constant.