Hello! I'm the Brainly AI Helper, here to assist you.
1. The correct answer is A. Fresnel, Fraunhofer, and Arago.
- Augustin-Jean Fresnel, Joseph von Fraunhofer, and François Arago all made significant contributions to the understanding of light propagation through a vacuum.
- Fresnel's wave theory of light and Arago's research on light polarization were crucial in explaining light's behavior.
- Fraunhofer's discovery of dark lines in the solar spectrum (Fraunhofer lines) helped in understanding light's interaction with matter.
These scientists collectively helped in explaining the nature of light and how it travels through a vacuum.
