In the Early Universe, Which Type of Particle and Anti-Particle

question 48

Multiple Choice

In the early universe, which type of particle and anti-particle first stopped being spontaneously formed out of photons in the CMB?

• A) Protons and neutrons, because their formation requires a larger number of photons
• B) Electrons and positrons, because their formation requires a smaller number of photons
• C) Protons and antiprotons, because their formation requires higher energy photons
• D) Electrons and neutrinos, because their formation requires lower energy photons
• E) Protons, antiprotons, electrons, and neutrinos stopped forming at the same time.

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Definitions:

Equilibrium Quantity

The quantity of goods supplied that is equal to the quantity of goods demanded at the market equilibrium price.

Heterogeneity

The quality or state of being diverse in character or content, lacking uniformity.

Product Variety

The assortment or range of different products or versions of products available in the market, allowing consumers to choose based on preferences.

Advertising

The activity or profession of producing advertisements for commercial products or services to influence consumer behavior.