How does radiation travel through space?

Radiation travels through space primarily in straight lines. This characteristic is due to the nature of electromagnetic radiation, which includes visible light, radio waves, and gamma rays. In a vacuum, these waves propagate uniformly and do not require a medium, allowing them to move in straight paths.

This straight-line propagation is significant in various contexts, such as understanding how light from distant stars reaches Earth or how radio waves travel across space. While radiation can interact with materials and create curved paths or scattering through various media, its fundamental travel in a vacuum occurs in straight lines. These properties are essential for the principles of optics and communication technologies that rely on the transmission of electromagnetic radiation.