The Doppler Effect is applicable for:

The Doppler Effect is a phenomenon observed when there is relative motion between a wave source and an observer, causing the frequency and wavelength of the wave to appear different. It applies to all types of waves, including sound waves and light waves.

For sound waves, the Doppler Effect is most familiar in everyday life. For example, when an ambulance with a siren moves towards you, the pitch of the siren sounds higher, and as it moves away, the pitch drops. This happens because the sound waves get compressed in front of the moving source and stretched behind it, changing the frequency perceived by the listener.

For light waves, the Doppler Effect explains important astronomical observations. When a star or galaxy moves away from Earth, its light appears redshifted (longer wavelength). When it moves towards Earth, the light appears blueshifted (shorter wavelength). This principle helps astronomers measure the motion and speed of stars, galaxies, and other celestial bodies in the universe.

The Doppler Effect does not apply only to one type of wave; it is a general property of waves in motion. Its mathematical formulation depends on the relative velocity of the source and observer, the wave speed, and the wavelength.

Understanding the Doppler Effect is essential in physics, astronomy, meteorology, and even medical imaging (e.g., Doppler ultrasound). It illustrates how wave properties are influenced by motion and provides practical applications in both everyday life and scientific research.

In summary, the Doppler Effect is applicable to both sound waves and light waves, making it a fundamental concept in understanding wave behavior, motion, and the interaction between waves and moving observers.