Why Is the Cosmic Microwave Background (CMB)so Cold,if the Early

question 12

Multiple Choice

Why is the cosmic microwave background (CMB) so cold,if the early universe was so hot?

• A)Enough time has passed for matter in the universe to release enough heat to cool down.
• B)The CMB constantly interacts with atoms, which effectively cools down the photons.
• C)The expansion of the universe has redshifted those photons to an effectively cooler temperature.
• D)The Big Bang was initially hot but the CMB was released from cold material much later on.

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Definitions:

Noncash Transfers

Types of government assistance such as food stamps and housing vouchers that provide benefits other than direct cash payments.

Income Inequality

Income inequality refers to the unequal distribution of income among a population, often measured using various statistical methods to illustrate disparities in wealth.

Housing Subsidies

Financial assistance provided by a government or organization to help individuals or families afford housing, typically to reduce housing expenses to a manageable level.

Low-Income Households

Low-income households are those whose total income falls below a certain threshold, designated by governmental policies, indicating they earn significantly less than the country's median or average household income.