Question

What's meaning of blue shift?​

Answer 1

Answer:

Blueshift. ... A blueshift is any decrease in wavelength (increase in energy), with a corresponding increase in frequency, of an electromagnetic wave; the opposite effect is referred to as redshift. In visible light, this shifts the color from the red end of the spectrum to the blue end.

Answer 2

Answer:

Blue shift is the displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving towards the observer...