SOLAR SYSTEM

UNIVERSE

SPACE EXPLORATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Radio astronomers Arno Penzias and Robert Wilson discovered a microwave signal during their research in 1964. The microwaves were uniform and coming from all directions in the sky. The phenomenon known as Cosmic Microwave Background (CMB) provided evidence that the universe was once very hot and dense.How did CMB contribute to the big bang theory?
A
CMB confirmed how matter expanded during the big bang.
B
CMB was the magnetic field that was created during the big bang.
C
CMB was a reflection of the thermal energy generated during the big bang.
D
CMB represented energy trails from moving matter that began with the big bang.
Explanation: 

Detailed explanation-1: -This cosmic radiation initially appeared to become weaker as wavelengths of the radiation became shorter. However, when Arno Penzias and Robert Wilson studied cosmic radiation in 1964, they discovered that microwaves with a wavelength of about 7 centimeters were stronger than expected.

Detailed explanation-2: -The discovery of cosmic microwave background radiation constitutes a major development in modern physical cosmology. In 1964, US physicist Arno Allan Penzias and radio-astronomer Robert Woodrow Wilson discovered the CMB, estimating its temperature as 3.5 K, as they experimented with the Holmdel Horn Antenna.

Detailed explanation-3: -On May 20, 1964, American radio astronomers Robert Wilson and Arno Penzias discovered the cosmic microwave background radiation (CMB), the ancient light that began saturating the universe 380, 000 years after its creation.

Detailed explanation-4: -When they pointed the antenna at empty patches of sky, the researchers stumbled on a low-level hiss. The constant noise would turn out to be cosmic radiation-cosmic microwave background-evidence for the Big Bang theory of the beginning of the universe.

Detailed explanation-5: -June 1963: Discovery of the Cosmic Microwave Background.

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