22
The
Standard Dust Models (Λ=0)
•Distance
Measures as a function of redshift
–Then to find the proper distance D,
recall from chapter 5 that D = R sin(r/R)
where script R is given by eq. 7-19. For an exercise you could derive the general expression:
–Notice what happens for an empty universe. Deriving this was a closed book exam question I had in grad school (prof
assumed we had the
curiosity to check this for ourselves).
