Red Shift

Red Shift

Category:

Education

Tags:

• Red
• Shift
• Doppler

[obliderated]

Quantum mechanics after you finish cosmology sal? You know you want to! :)

[eljpayne]

Awesome, the coolest thing in space!

[beeohaytee]

is the green a nod to great gatsby?

[leeruddick]

@exscape Thank you!

[exscape]

@leeruddick Yes, unless it's already in the far red, in which case it will become infrared (invisible to our eyes). It's still called redshift, though, despite that it is now coming "less" red (further away from red), because it's moving in the same direction as it was.

[kiensmf]

surely once a wave moves away from the source it just moves through space as normal, why would the fact that the source is moving away mean that it stretches the wavelength surely it just travels through at the same wavelength regardless until it reaches its destination.

[leeruddick]

Does Red Shift actually make the objects look redder?

[inomis91]

Correct me if im wrong please. But i thought The doppler effect applied to light too, The only difference being that its called the doppler effect when the object is moving relative to space, while its known as redshift when the object is standing stil relative to space and it´s space itself that is moving away from us.

[zenoparodie]

@obliderated cosmology..........never ends! Dundundudndun!

[magicmel02]

What I never get is:

I often hear that the further away an object is the faster it's moving away from us as if the expansion of the universe was even increasing.

It is never said that the expansion is actually slowing down which would make more sense to me. The further we look away the further we look into the past, i.e. far away objects seem faster than close objects which leads me to the thought that the expansion is slowing down

So I think I get to a different conclusion. Where is my mistake?

[SkepticInTraining]

@khanacademy 2) It might be informative to make a video about what an exploding universe (all matter being flung into existing stable space) would look like verses the expanding universe that we observe.