Doppler effect in science definition and examples

Have you ever wondered why the sound of an ambulance changes as it zooms past you? Or why the light from a distant star appears different from what it actually is? These intriguing phenomena can be explained by the Doppler Effect, a fundamental concept in the realm of physics and astronomy. Today, we'll embark on a journey to unravel the mysteries of this phenomenon, exploring its definition, underlying principles, and captivating examples.