What did American astronomers Robert Wilson and Arno Penzias discover with their radio telescopes in 1964?(1 point)Responsesthe visible spectrumthe visible spectrumCosmic Microwave Background radiationCosmic Microwave Background radiationthe Big Bangthe Big Bangthe electromagnetic spectrum

Answer 1

In 1964, American astronomers Robert Wilson and Arno Penzias discovered Cosmic Microwave Background radiation using their radio telescopes.