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Patrick Moore meets Halton Arp

In the Face Book group:

The post was a link to a video, Patrick Moore meets Halton Arp, May 1988.

My comment:
I am surprised Arp considered the red shift a property of the matter in the quasar, that perhaps changes over time.
As I pointed out in a post on May 15 (following  April 24 on just quasars), absorption and emission lines are caused by loose atoms, not the light source. Their presence and motion does not have to be treated as the motion of the quasar behind these atoms.
The largest red shifts are hydrogen emission lines, meaning only those atoms are superluminal, not the quasar (or its mass). I agree with Arp the shifts are not interpreted correctly but I interpret those for a quasar just as other spectral line shifts, where none have anything to do with age of matter.

This comment in response:

'
If Red Shift is right, doesn't that mean that Red is the slowest particle of Light compared to all the others that travel faster, maybe even at different speeds, and is why a glass prism can separate then into their own paths? Because they arrive at different times. '
A link to information about prisms was also included.

My reply:

Light slows its velocity of propagation in a transparent medium, based on its density.
Wavelength has nothing to do with velocity of light.
The longer wavelengths slow more than shorter(blue)
The sky is blue because it scatters more. Nothing to do with velocity.

I added this reply:

 I am wrong. ' In vacuum all light travels at the same speed. In most materials the blue and violet light travels faster than red. This phenomenon is called dispersion.'

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