Time Frames for Negative Information. Late payments are black marks that normally stay on a credit report for 7 years. That's true of most negative information like foreclosures, Chapter 13 bankruptcies, charge-offs and paid tax liens; a Chapter 7 bankruptcy stays around for 10 years and unpaid tax liens can linger indefinitely.
Wiktionary (0.00 / 0 votes) Rate this definition: Doppler effect (Noun). The apparent change in frequency or wavelength of a wave that is perceived by an observer moving relative to the source of the waves. Origin: From Johann Christian Andreas Doppler, the scientist who first proposed this effect.
The Doppler effect. We have seen that light always travels at the same speed of about 300,000 km/s; in particular light emitted by a sources in relative motion to an observer travels at this speed.Yet there is one effect on light which shows that its source is moving with respect to the observer: its color changes.he Doppler effect. We have seen that light always travels at the same speed of about 300,000 km/s; in particular light emitted by a sources in relative motion to an observer travels at this speed.