how does weak background radiation coming from every direction in the sky support the big bang theory?
It provides evidence of universe contraction
it provides evidence of the universe's increasing mass
it provides evidence of the universe's decreasing mass
it provides evidence if universal expansion
It provides evidence of universal expansion. The weak background radiation that is detected coming from every direction in the sky is known as the cosmic microwave background (CMB) radiation. This radiation is a remnant from the early stages of the universe, around 380,000 years after the Big Bang. The fact that this radiation is uniformly distributed in all directions suggests that the universe expanded and cooled down from a hot and dense state, supporting the idea of the Big Bang theory.
The weak background radiation coming from every direction in the sky, known as the cosmic microwave background (CMB), supports the big bang theory by providing evidence of universal expansion.
The big bang theory states that the universe originated from a tremendously hot and dense state about 13.8 billion years ago. According to this theory, the universe has been expanding ever since.
The CMB is a faint glow of radiation that permeates the entire universe. It is essentially the afterglow of the intense heat of the early universe, which has cooled and stretched over time due to the expansion of space.
The fact that the CMB is observed coming from every direction in the sky indicates that it is uniformly distributed throughout the universe. This uniformity of the CMB supports the idea that the universe is isotropic (it appears the same in all directions) and homogeneous (it has a consistent density at large scales). These properties are predicted by the big bang theory.
Furthermore, observations of the CMB reveal tiny fluctuations or variations in temperature across the sky. These fluctuations provide valuable information about the early universe, as they are believed to have arisen from quantum fluctuations during the rapid expansion phase known as cosmic inflation.
By studying these fluctuations, scientists have been able to measure important cosmological parameters, such as the age, size, and composition of the universe. These measurements have strongly supported the concept of universal expansion, which is a fundamental aspect of the big bang theory.
The weak background radiation coming from every direction in the sky, known as the Cosmic Microwave Background (CMB), provides evidence for the Big Bang theory in terms of the universe's expansion.
To understand this, let's break it down step by step:
1. The Big Bang Theory: The Big Bang theory explains the origin and evolution of the universe. It suggests that the universe started from an extremely hot and dense state about 13.8 billion years ago, and has been expanding ever since.
2. Cosmic Microwave Background (CMB): The CMB is a faint radiation that permeates the entire observable universe. It was discovered in 1965 and is considered the afterglow of the Big Bang. This radiation corresponds to the light that was emitted about 380,000 years after the Big Bang when the universe became transparent to light.
3. Heat Redistribution: Early in the universe's history, it was filled with a hot, dense plasma that is opaque to light. As the universe expanded, this plasma cooled down. When the universe became transparent to light, the photons scattered less frequently and started their cosmic journey without significant interaction.
4. Observing CMB: The CMB radiation can be detected by radio telescopes and specialized satellites, such as the Cosmic Background Explorer (COBE), the Wilkinson Microwave Anisotropy Probe (WMAP), and the Planck satellite. These instruments have mapped the temperature fluctuations in the CMB across the sky.
5. Evidence for Universal Expansion: The CMB supports the Big Bang theory by providing evidence for the expansion of the universe. The observed CMB radiation exhibits a uniform and isotropic distribution in all directions, regardless of our location in the universe. This indicates that the universe is homogeneous and isotropic on large scales, supporting the notion that it has been expanding uniformly in all directions since the Big Bang.
So, to answer your question, the weak background radiation coming from every direction in the sky (CMB) supports the Big Bang theory by providing evidence of universal expansion, rather than universe contraction, increasing mass, or decreasing mass.