Describe one observation that supports the big bang theory?

Answer 1

The observation of cosmological redshift is one such example. It was observed that the 'redshift' of galaxies, which is the shift in the electromagnetic spectrum emitted or reflected by a galaxy to lower wavelengths (the redder wavelengths), was directly related to the distance of the galaxy. The further away a galaxy, the greater redshift in its spectrum. This supported the metric expansion of space proposed by the big bang theory. It is proposed that photons travelling in an expanding space are 'stretched' and therefore shift to a lower wavelength.
The Big Bang supports interpreted observational evidence of the Cosmic Microwave Background Radiation (CMBR) barrier that the universe is Time bound (or has a finite existence), that the universe is expanding (within the dimensional limits of Space and Time), that the universe is evolving a set amount of matter and energy while it is expanding over time, and that the universe is homogeneous and isotropic with respect to Space and Time.

Answer 2

The big bang is a widely accepted starting point for the universe. Experimental evidence strongly supports the evolution of the universe from a single hyper dense point. The first piece of experimental data to support the big bang model of cosmology is the existance of the cosmic microwave background (CMB). When the universe was first created a huge amount of energy was released. This energy formed into quarks, leptons over time. The quarks combined to form protons. The formation of atoms did not occur at this point as the electrons were unable to combine with the protons due to extremely high temperatures. An additional consequence of these temepratures was a vast amount of light was produced. This light bounced around inside the primordial soup of plasma (electron free protons) unable to escape due to the high density of protons. As the universe expanded and cooled the electrons eventually combined with the protons (and He nuclei that had also formed over the 360,000 years of plamarised universe) to form the first atoms.

Once this had occured the photons were able to escape. As a consequence of the sheer scale of the universe and the finite speed of light some of these photons are only reaching our detectors now, they took that long to cross the void of the universe. It has been found that the energy of these photons is roughly uniform in all directions of the sky. This suggests they must have formed at every point in the universe at the same time. This experimental conclusion matches the theoretical explanation above, it is the most reasonable explanation of this phenomena. Tiny changes in the energy of the photons from different parts of the sky also correspond to where galaxies form, supporting the current model for galaxy formation, which also stipulates that there was a big bang.

The next piece of experimental data comes from the expansion of the galaxy. The galaxy is expanding uniformly in all directions. Initially this placed our galaxy in the centre of the universe, it was thought everything was receeding from us. However, the way superclusters (groups of groups of galaxies) interact showed diminishing gravitational effects. Since gravity weakens as separation increases this suggested that each cluster was also receeding from each other. This implies that every group of galaxies is moving away from every other group of galaxies. The easiest way to understand this is to imagine drawing dots on a baloon. When you blow up the baloon every point moves away from one another but none remain stationary. Just as with th baloon this means that everything was once closer together. If this is extrapolated then at some time everything must have been at the same spatial position, thrust out by the inital big bang.
There are none. God created the world.

That our Universe has, for the last 13.7 billion years, been expanding at pretty much a constant rate, is pretty much irrefutably shown by Hubble's Constant and the nature of cosmic microwave background radiation. Also by the ratio of hydrogen to helium in our Universe.

All other hypotheses can do nothing more than say, "I don't know WHY these three observations are the way they are -- they just ARE."

The Big Bang Theory (NOT a hypothesis, any more than gravity is just a hypothesis) does NOT attempt to explain what occurred prior to the start of this expansion. If just states what has happened since.

Answer 3

Hello i am minakshi and answer of your question is that the electromagnetic radiation supports the big bang theory through doplers effect it states that any galaxy which is moving towards the red end of the spectrum and we use this to calculate the age of the universe it is related to electromagnetic radiation because

light is a form of electromagnetic radiation .

Answer 4

The observation of the cosmic microwave background radiation, which is leftover radiation from the early universe, is a key piece of evidence supporting the big bang theory. This radiation is uniform in all directions and has a temperature that fits with what is predicted by the big bang model.