FariÃ±a grew up in Brooklyn, the daughter of two Spanish immigrants who spoke that language at home. At Monday's press conference, she told a story of a postcard that her father, who she said had a third-grade education and taught her about the importance of education, received in the mail from her school.
The Doppler effect is the apparent shift in wave frequency due to the movement of a wave source. The apparent frequency shifts upward when the wave source is approaching and downward when the wave source is retreating. The Doppler effect explains why we perceive a change in pitch of the sound of a passing siren.
a: a change in frequency resulting in a change in position of a spectral line or band â compare doppler effect b: a removal or transfer from one thing or place to another â see chloride shift Learn More about shift