GENERAL KNOWLEDGE

Detailed explanation-1: -Dicke had begun looking for evidence to support his theory when Penzias and Wilson got in touch with his laboratory. He visited Bell Labs and confirmed that the mysterious radio signal was indeed the cosmic background radiation-proof of the Big Bang.

Detailed explanation-2: -With their discovery of the cosmic microwave background in 1964, Arno Penzias and Robert Wilson placed the seal of approval on the Big Bang Theory and shared the 1978 Nobel Prize in Physics for their discovery.

Detailed explanation-3: -Penzias and Wilson finally realized that the mysterious radio signal was cosmic radiation that had survived from the very early days of the universe. It was proof of the Big Bang.

Detailed explanation-4: -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.