The Doppler Effect and Star Spectra
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Doppler Effect in Light Ever wondered how scientists know if a star is moving toward or away from us? It’s all thanks to the Doppler Effect in light! When a star moves toward Earth, its light waves get compressed, shifting the spectral lines toward the blue—this is called a blue shift. When it moves away, the waves stretch out, causing a red shift. These tiny shifts in light tell us about the motion of stars, galaxies, and even the expansion of the universe! | Fadhel Mahdi
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Doppler Effect - Full explanation The Doppler Effect is the change in the frequency or wavelength of a wave as observed by someone moving relative to the source of the wave. In Simple Terms: When a source of sound (or light) moves towards you, the waves are compressed, you hear a higher pitch (higher frequency). When the source moves away, the waves are stretched, you hear a lower pitch (lower frequency). Common Example: Imagine an ambulance driving past you: • As it approaches, the siren sounds
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