What is a space wave?

What is a space wave?

• A. A wave that travels in a straight line and does not follow the Earth's surface.
• B. A wave that travels along the Earth's surface.
• C. A wave that bounces off the ionosphere and returns to Earth.
• D. A wave that is absorbed by the atmosphere.

Answer: (A)

Space waves propagate through space rather than along the Earth's surface. They travel in straight lines, so their path does not follow the curvature of the ground. This is exactly what the statement describes. Ground waves stay tied to the surface, while waves that bounce off the ionosphere (sky waves) use a different mechanism for long-distance reach, and a wave absorbed by the atmosphere wouldn’t propagate effectively at all.

Space waves propagate through space rather than along the Earth's surface. They travel in straight lines, so their path does not follow the curvature of the ground. This is exactly what the statement describes. Ground waves stay tied to the surface, while waves that bounce off the ionosphere (sky waves) use a different mechanism for long-distance reach, and a wave absorbed by the atmosphere wouldn’t propagate effectively at all.