Question

select the correct answer. which observational tool helped astronomers arno penzias and robert wilson discover the existence of the cosmic microwave background (cmb)? a. optical telescope b. radio telescope c. a digital camera d. space telescope

Explanation:

Arno Penzias and Robert Wilson discovered the cosmic microwave background radiation using a radio - telescope while working at Bell Labs. They were initially trying to eliminate noise in a radio - communication experiment and accidentally detected the CMB.

Answer:

B. radio telescope