Question

Radiation from the early history of the universe was stretched by the expansion of the universe until today it is in the form of

a. X-rays
b. Ultraviolet waves
c. Infrared waves
d. Radio waves

Answer 1

Radiation from the early history of the universe, the Cosmic Microwave Background, was stretched due to the expansion of the universe and now exists primarily as microwave radiation, which is a type of radio wave.

Step-by-step explanation:

Radiation from the early history of the universe, often referred to as the Cosmic Microwave Background (CMB), was emitted about 380,000 years after the Big Bang. As the universe expanded, this radiation was stretched, increasing its wavelength. Today, the CMB radiation is in the form of microwave radiation, which falls under the category of radio waves on the electromagnetic spectrum. This radiation is a relic of the early universe and provides critical information about its composition and development.