Doppler Effect — Prelims Questions

Which of the following phenomena is NOT an application of the Doppler Effect?

Consider the following statements regarding the Doppler Effect: 1. It applies only to sound waves, not electromagnetic waves. 2. Redshift indicates a source moving away from the observer. 3. The perceived frequency increases when the source and observer move towards each other. Which of the statements given above is/are correct?

An ambulance siren sounds higher in pitch as it approaches and lower as it moves away. This phenomenon is best explained by:

In the context of astronomy, what does a 'blueshift' in the light from a distant galaxy indicate?

Which of the following statements about Doppler Weather Radar is correct?