The expansion of space and redshift of light

[Chromed1]

Preface of my understanding:

While galaxies may be moving, they are primary enacted upon by the expansion space.

while a galaxies standard motion accounts for some redshift, most redshift derives from the expansion of space.

 

Primary questions:

1. I am not entirely sure how space itself expanding impacts the frequeency of light, does it smear out light of the expanded area?

 

2. As space expands there is now more space TO expand therefore causing the acceleration we see. So can we observe the redshift of the most distant galaxies getting more and more red the further they get... if indeed the further they are the faster they go?(i.e. measure redshift today, come back next year and it's further redshifted?)

[Spyman]

1. Lightwaves get stretched together with space when it expands.

 

 

"Two different sources of redshift: Top, Doppler shift: the star moving to the left emits light that is blue shifted in the direction of the receiving antenna that the star approaches, and red shifted in the direction of the receiving antenna that the star is leaving. Center and bottom panels: cosmological expansion: The distance between the emitting star and both antennas increases while the light is propagating, increasing the wavelength of the light seen by both antennas. Each panel shows the propagation of light over two periods: in the center panel at time of emission the wavelength is short, and in the bottom panel at time of reception the wavelength has stretched with the expansion of space. Patterned after Koupelis & Kuhn. The reader is cautioned that too literal an interpretation of this figure can be misleading. In particular, the Doppler shift panel is seen from a single inertial frame, that of the two antennas. The cosmological expansion panels are a concatenation of local inertial frames spanning the space between the various locally stationary objects."

 

"As a result, photons propagating through the expanding space are stretched, creating the cosmological redshift. This differs from the Doppler effect redshifts described above because the velocity boost (i.e. the Lorentz transformation) between the source and observer is not due to classical momentum and energy transfer, but instead the photons increase in wavelength and redshift as the space through which they are traveling expands."

http://en.wikipedia.org/wiki/Redshift

 

 

2. The mechanism how space does expand is not known, but observations confirm that the redshift is increasing with increased distance and that the expansion is accelerating.

 

 

 

"In physical cosmology, astronomy and celestial mechanics, dark energy is a hypothetical form of energy that permeates all of space and tends to increase the rate of expansion of the universe. Dark energy is the most popular way to explain recent observations and experiments that the universe appears to be expanding at an accelerating rate."

http://en.wikipedia.org/wiki/Dark_energy

 

"Hubble's law describes the observation in physical cosmology that the velocity at which various galaxies are receding from the Earth is proportional to their distance from us."

"The law is often expressed by the equation v = H₀D, with H₀ the constant of proportionality (the Hubble constant) between the distance D to a galaxy and its velocity v."

"The most recent observational determination of the proportionality constant obtained in 2009 by using the Hubble Space Telescope (HST) yielded a value of H₀ = 74.2 ± 3.6 (km/s)/Mpc."

http://en.wikipedia.org/wiki/Hubble%27s_law