What is the temperature of the Cosmic Microwave Background (CMB)?Group of answer choices70 Farenheit0 Celsius100 Kelvin3 Kelvin

Break Down the Problem

1. Identify the existing scientific knowledge regarding the Cosmic Microwave Background (CMB).
2. Analyze the answer choices given in relation to the CMB's known temperature.

Relevant Concepts

1. The Cosmic Microwave Background radiation is a relic of the Big Bang and is uniformly spread throughout the universe.
2. Its temperature is approximately 2.726 Kelvin (K).

Analysis and Detail

1. The CMB temperature can be converted to other temperature units for comparison:
   • Kelvin to Celsius: $T(°C) = T(K) - 273.15$
   • Kelvin to Fahrenheit: $T(°F) = T(K) \times \frac{9}{5} - 459.67$
2. Using the known CMB temperature of approximately 2.726 K:
   • Convert to Celsius: $2.726 K - 273.15 = -270.424 °C$
   • Convert to Fahrenheit: $2.726 K \times \frac{9}{5} - 459.67 \approx -454.76 °F$

Verify and Summarize

1. The calculations confirm the CMB temperature is approximately 3 K when approximated, which fits the choices provided.
2. The temperature of the Cosmic Microwave Background is primarily known to be about 2.726 K, which is closest to 3 Kelvin among the given options.

Final Answer

The correct temperature of the Cosmic Microwave Background (CMB) is approximately 3 Kelvin.