Posted by **qwerty** on Wednesday, January 16, 2013 at 12:17am.

The most cosmological measurements show that the universe is extremely flat (Ωk≈0) and that the surface brightness of objects scales with the fourth power of redshift (SB∝z^−4). If the universe was still expanding, but had strong negative curvature (Ωk>1), how would SB scale with z? Define α such that SB∝z^α.

* Surface brightness doesn’t scale with redshift if Ωk>1

* α less than −4

* α=−4 (no change)

* α more than −4

- Cosmology -
**Roland**, Tuesday, January 27, 2015 at 9:12am
á less than −4

## Answer This Question

## Related Questions

- Cosmology - The solution of Olbers' Paradox is: - The universe is opaque at ...
- Cosmology - A curvature constant of k=0, as used in the Friedmann equation, ...
- unsolved mysteries astrophysics - Q3.2 COLLAPSE TIMESCALE (5 points possible) ...
- physics - Consider the following circuit. 7.3 Ω 3.0 Ω 3.0 Ω 4.5...
- Cosmology - Lookback time for a given redshift, tL(z), is... * time between the ...
- astronomy - Imagine that you live in a distant galaxy far far away. This galaxy ...
- Earth Science - True or false? ------------------------- Although there is ...
- Cosmology - Cosmological redshift is defined as R(t0)/R(te) = - 1+z - 1 / 1&#...
- physics - the ﬁgure is 4.00 W. E 3.0 Ω 15.0 Ω 5.0 Ω 4.3 &#...
- Universe and the Stars - what s the osc illating theory of universe? the ...

More Related Questions