GENERAL KNOWLEDGE

Detailed explanation-1: -Well, let’s look at redshifted first. All it means is that if something is moving away from us, then its spectral lines will move towards the red end of the spectrum. Same thing with blueshift, if something is moving towards us, then the spectral lines will move towards the blue end of the spectrum.

Detailed explanation-2: -As an object moves away from us, the sound or light waves emitted by the object are stretched out, which makes them have a lower pitch and moves them towards the red end of the electromagnetic spectrum, where light has a longer wavelength. In the case of light waves, this is called redshift.

Detailed explanation-3: -While the star is moving away from us, the light is redshifted: All of the wavelengths look stretched out and the absorption lines appear at longer (redder) wavelengths (bottom spectrum).

Detailed explanation-4: -Redshift and blueshift describe the change in the frequency of a light wave depending on whether an object is moving towards or away from us. When an object is moving away from us, the light from the object is known as redshift, and when an object is moving towards us, the light from the object is known as blueshift.