A reduction of light wavelengths, caused by a motion toward the observer. So called because blue light has shorter wavelengths than red light.
Apparent shortening of the wavelength due to Doppler effect, of radiation received from a source in motion toward the observer.
a shift in electromagnetic radiation towards the blue (or shorter end of the spectrum) which is the result of movement towards the observer
Motion-induced change in the observed wavelength from a source that is moving toward us. Relative approaching motion between the object and the observer causes the wavelength to appear shorter (and hence bluer) than if there were no motion at all.
The blue shift is a decrease in the wavelength of the light that is emitted from an object that is moving toward us. This decrease in wavelength makes the object appear to be bluer than it actually is. For example, when a star is travelling towards Earth, its light appears bluer (the light waves are shortened, shortening the wavelength). Compare with red shift.
A displacement of emission or absorption line patterns toward the blue end of the spectrum as a result of the Doppler effect. As a star travels toward an observer, the wavelength of the star light decreases. The observer sees the star as "bluer" than the same star at rest, and the magnitude of the shift corresponds to the velocity of the source. See also Doppler effect red shift
A term used to describe the apparent increase in frequency that an observer detects due to relative motion between the source and the observer, such that the two are getting closer together.
A decrease in the wavelength of the radiation emitted by an approaching celestial body as a consequence of the Doppler effect; a shift toward the short-wavelength (blue) end of the spectrum.
The Doppler shortening of the wavelength of radiation (or the shifting of spectral lines toward smaller wavelengths) caused by some net motion of approach.
A displacement of absorption-line patterns toward the blue end of the spectrum. Such a shift caused by the speed of an object relative to an observer is an example of the Doppler effect. As a star travels toward an observer, the wavelength of the star light decreases. The observer sees the star as "bluer" than the same star at rest.
If an astronomical body is moving towards the observer, the light will seem to be shifted to the blue end of the spectrum. The faster the movement, the greater the blue shift. It occurs because the wavelength of light is slightly compressed by the Doppler effect as the body moves towards the observer. Blue shift is measured by looking at the key spectral lines. For an object moving towards the Solar System, they will appear closer to the blue end than normal. The faster the object is approaching, the greater the blue shift will be.
Blue Shift is the tenth story chronologically to appear in Stephen Baxter's science fiction anthology novel Vacuum Diagrams. "Blue Shift" was originally published in Writers of the Future volume 5 in 1989.
Blue shift is the opposite of redshift, the latter being much more noted due to its importance to modern astronomy. It is also used informally to refer to a hypsochromic shift in photochemistry.