30 Reasons Why The Universe May Be Expanding Fast

Defining Redshifts

8. Defining Redshifts

In physics, a redshift is commonly known as an increase in wavelength and a decrease in frequency and photon energy. This downshift is sometimes called a negative redshift, or more commonly, a blueshift.

There are three main causes of redshifts. The first is because of radiation traveling between objects that are moving apart and is known as a relativistic Doppler effect.

The second cause is due to the same radiation traveling towards objects that have weaker gravitational potential, and more specifically, if these objects have a curved gravitational redshift.

The last cause of redshifts could be how they are affected by radiation traveling freely through the ever-expanding space, and can sometimes correspond to objects’ distance from earth.

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