Understanding Fraunhofer's Discovery

Fraunhofer's discovery of spectral lines revealed that the visible universe, including planets, stars, galaxies, and life itself, is composed of the same elements. This groundbreaking finding continues to influence our understanding of the cosmos.

What did Fraunhofer do immediately after discovering the spectral lines?

• He kept the discovery a secret.

• He published everything he knew about them.

• He destroyed his research.

• He sold the information to a private company.

What is the ongoing significance of Fraunhofer's discovery?

• It explained the origin of the universe.

• It revealed the speed of light.

• It showed that the cosmos is made of the same elements.

• It proved the existence of black holes.

Which of the following is NOT mentioned as being made of the same elements as the cosmos?

• Stars

• Planets

• Galaxies

• Black holes

According to the transcript, what are humans and all life made of?

• Star stuff

• Dark matter

• Cosmic dust

• Unique elements

What did Fraunhofer's spectral lines reveal about the visible cosmos?

• It is shrinking.

• It is made of different elements.

• It is made of the same elements.

• It is constantly expanding.