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Jinsi ya kukokotoa Redshift

Redshift ni nini?

Redshift (z) measures wavelength increase due to cosmic expansion or relative motion. Higher z indicates greater distance or recession speed.

Fomula

Calculate z = (λ_obs - λ_rest) / λ_rest
z
(λ_obs - λ_rest) / λ_rest — (λ_obs - λ_rest) / λ_rest

Mwongozo wa Hatua kwa Hatua

  1. 1Input observed and rest wavelengths
  2. 2Calculate z = (λ_obs - λ_rest) / λ_rest
  3. 3Estimate distance using Hubble constant

Mifano Iliyotatuliwa

Ingizo
z = 0.1
Matokeo
Recession velocity ~10,000 km/s, distance ~400 Mpc
Using H₀ = 70 km/s/Mpc

Makosa ya Kawaida ya Kuepuka

  • Confusing Doppler redshift with cosmological redshift
  • Using non-relativistic formulas for high z

Maswali yanayoulizwa mara kwa mara

Does redshift mean object moving away?

Usually yes, but expansion also redshifts distant objects even in static space.

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