frekvenciaeltolódást

Frekvenciaeltolódás, commonly known as redshift in English, is a phenomenon observed in physics and astronomy. It describes the change in frequency of a wave, such as light or sound, as the source of the wave and the observer move relative to each other. When the source and observer are moving away from each other, the observed frequency is lower than the emitted frequency, a phenomenon known as redshift. Conversely, when they are moving towards each other, the observed frequency is higher, which is called blueshift.

The Doppler effect is the underlying principle behind frequency shift. For light waves, redshift has profound implications in astronomy. By measuring the redshift of light from distant galaxies, astronomers can determine their radial velocity, i.e., how fast they are moving away from us. The greater the redshift, the faster the galaxy is receding. This observation is a cornerstone of the expanding universe theory, suggesting that galaxies are not static but are moving apart from one another.

The amount of redshift is often quantified by the redshift parameter, denoted by the letter 'z'. A positive value of 'z' indicates redshift, while a negative value indicates blueshift. The formula for redshift relates the observed wavelength (λ_observed) to the emitted wavelength (λ_emitted) as z = (λ_observed - λ_emitted) / λ_emitted. This simple relationship allows for the calculation of the extent of the frequency shift and, consequently, the relative velocity of celestial objects. Beyond astronomy, frequency shift principles are also applied in fields like radar technology and medical imaging.