6 ms·
> Conversely, if the particles were to become lighter, the frequencies would become redshifted. > If all masses were once lower, and had been constantly increa
by _bxg1 8y ago
> Conversely, if the particles were to become lighter, the frequencies would become redshifted.
> If all masses were once lower, and had been constantly increasing, the colours of old galaxies would look redshifted
Can anyone explain this apparent contradiction?
- lkrubner 8y agoIf all masses were once lower, and had been constantly increasing, then those galaxies are now blue-shifted, and blue shifted is what we have come to think of as normal. But billions of years ago, when they were lighter, they were emitting photons that, to us now, in the present, seem red-shifted. They seem redshifted because they come from the past, when things were lighter.
- ddingus 8y agoThank you. My head hurts. Your explanation helped.
- Dylan16807 8y agoOr in very straightforward terms: lightweight is red, heavy is blue If everything constantly grows heavier then the past is red and the future is blue.