In the early 1960s,physicists named Penzias and Wilson detected a persistent noise at a wavelength of 1 mm in their radio telescope that came from all directions in the sky due to
A) synchrotron emission from the Crab Nebula.
B) emission from newly formed stars in the Orion Nebula.
C) cellphone usage.
D) photons left over from the Big Bang.

Question

Quizplus · Accepted Answer

The persistent noise detected by Penzias and Wilson at a wavelength of 1 mm was consistent with the predicted signature of the cosmic microwave background radiation, which is considered to be the leftover radiation from the Big Bang. This discovery provided strong evidence for the Big Bang model of the origin of the universe.

In the Early 1960s,physicists Named Penzias and Wilson Detected a Persistent