☰
Massive Body
Earth (5.97×10²⁴ kg)
Sun (1.99×10³⁰ kg)
White Dwarf (1.4 M☉)
Neutron Star (2.0 M☉)
Black Hole (10 M☉)
Emission Radius
r
emit
=
3.00
R
s
Observer Radius
r
obs
=
100.0
R
s
Emitted Wavelength
λ
emit
=
500
nm
Launch Photon
Redshift z
0.000000
λ emitted
500 nm
λ observed
500 nm
Schwarzschild R
s
—
380 nm
750 nm
Photon wavelength stretches climbing the well — z = f
emit
/f
obs
− 1, f(r) = √(1−R
s
/r)