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Which of the following is not evidence for the Big Bang Model?The universe does not contain any stable anti-matter.Helium accounts for about 25% of the nuclear matter in the universe.The light from distant galaxies is red-shifted.The universe is filled with microwave radiation of wavelength about 1mm.

Question

Which of the following is not evidence for the Big Bang Model?The universe does not contain any stable anti-matter.Helium accounts for about 25% of the nuclear matter in the universe.The light from distant galaxies is red-shifted.The universe is filled with microwave radiation of wavelength about 1mm.

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Solution

The statement "The universe does not contain any stable anti-matter" is not evidence for the Big Bang Model.

Here's why:

  1. The Big Bang Model: This is a cosmological model that describes the universe from the earliest known periods through its subsequent large-scale evolution. The model describes how the universe expanded from an extremely high-density and high-temperature state and offers a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background (CMB) radiation, and the Hubble diagram (redshift of galaxies).

  2. Stable Anti-Matter: Anti-matter is a material composed of antiparticles, which have the same mass as particles of ordinary matter but have opposite charge and other particle properties. The absence of observable anti-matter in the universe is not a prediction of the Big Bang Model. In fact, the Big Bang should have produced equal amounts of matter and anti-matter, and this is one of the unsolved problems in physics.

  3. Helium Abundance: The fact that helium accounts for about 25% of the nuclear matter in the universe is a prediction of the Big Bang Model. This is based on the theory of Big Bang nucleosynthesis, which predicts the observed abundance of the light elements in the universe (hydrogen, helium, and lithium).

  4. Red-Shifted Light: The observation that the light from distant galaxies is red-shifted is evidence for the Big Bang Model. This is interpreted as a Doppler shift that is proportional to the distance of the galaxies from us, implying the universe is expanding.

  5. Microwave Background Radiation: The existence of the cosmic microwave background radiation is a prediction of the Big Bang Model. This radiation fills all space and is the heat left over from the Big Bang. Its discovery in 1965 was a major confirmation of the Big Bang Model.

So, the statement "The universe does not contain any stable anti-matter" is not evidence for the Big Bang Model.

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