130 likes | 234 Vues
Delve into the phenomenon of redshift, the key evidence for an expanding universe due to the Big Bang. Learn how redshift affects light from distant galaxies, indicating their distance and speed. Discover how Cosmic Microwave Background Radiation (CMBR) supports the Big Bang theory. Explore how redshift helps us understand the universe's evolution and expansion dynamics.
E N D
Big bang
Less/ no light pollution Less atmospheric distortion/ interference Less/ no cloud cover Image is clearer
Light is red shifted The further away the galaxy is, the bigger the effect The universe is expanding
Observed – original = Z x orginal Observed – 600 = 0.15 x 600 = 90 600 + 90 = 690
Distance from the Earth Speed the stars/ galaxies are moving away from the earth
The microwave radiation comes from radiation present just after the big bang The big bang is currently the only way of explaining CMBR The wavelength is decreased and the frequency increased
It is furthest away; it has the largest red shift; it is moving away the fastest. C
The observed wavelength of the dark line from the distant galaxy is increased Therefore the distant galaxy must be moving outwards from a small initial point This suggests the universe is expanding