2004/10/09 | 角度[Angular Size]
类别(Ω〖物理〗) | 评论(0) | 阅读(29) | 发表于 12:48
In cosmology, the angular size is defined by
(1)

where l is the length of the object. In the Einstein-de Sitter cosmological model, Let a be the expansion parameter, the critical density parameter,H the Hubble constant,and z the gravitational redshift. Then
(2)

The minimum is at
(3)

(4)

(5)

(6)

(7)
0

评论Comments

日志分类
首页[1408]
∑〖数学〗[349]
Ω〖物理〗[357]
¤〖天文〗[343]
℃〖化学〗[359]