Which characteristics apply to electromagnetic waves?

• A. Travel in straight lines and can bounce off surfaces
• B. Travel only through matter
• C. Move by particles bumping into each other
• D. Only travel through space

Answer: (A)

Electromagnetic waves possess the characteristics of traveling in straight lines and being able to bounce off surfaces. This behavior is fundamental to how electromagnetic radiation interacts with objects in its path, which includes reflection, refraction, and diffraction. For instance, when light waves encounter a reflective surface, they change direction according to the law of reflection, which is a key principle in optics.

In contrast, other options do not accurately describe electromagnetic waves. They do not require a medium to propagate; they can travel through both a vacuum (space) and various materials. Additionally, electromagnetic waves do not rely on particle collisions for movement, as they are continuous waves described by oscillating electric and magnetic fields. Thus, the ability to travel in straight lines and reflect off surfaces is a defining trait of electromagnetic waves, making this the correct choice.