Redshift

What it does

I fysikken beskriver redshift (rødforskydning) og blueshift (blåforskydning) ændringer i lysets bølgelængde. Disse fænomener giver os vigtige informationer om universets bevægelser, galaksers udvikling og selve rumtidens natur. Denne artikel forklarer, hvad redshift og blueshift er, deres typer, historiske baggrund samt hvordan astronomer bruger dem i dag. Redshift betyder, at lysets bølgelængde bliver længere. Når dette sker, falder både frekvensen og energien i fotonerne, og lyset forskydes mod den røde ende af spektret. Blueshift er det modsatte af redshift. Her forkortes bølgelængden, og frekvensen og energien stiger. Lyset forskydes mod den blå ende af spektret, når en lyskilde bevæger…from jonls.dk

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