Question

1. in communication technology, radio waves are used to transmit information over long distances. these waves can travel through the atmosphere and reach the ionosphere, an electrically charged layer high above the earth. when the radio waves encounter the ionosphere, they bounce back toward the earth’s surface, allowing signals to cover vast distances. which wave behavior explains this phenomenon?

options: diffraction, interference, refraction, reflection

Explanation:

To solve this, we analyze each wave behavior:

• Diffraction: Bending around obstacles, not bouncing back.
• Interference: Superposition of waves, not related to bouncing.
• Refraction: Bending when entering a new medium, not bouncing back.
• Reflection: Wave bouncing off a surface. The ionosphere acts as a surface, and radio waves “bounce back” (reflect) toward Earth.

Answer:

Reflection (the option labeled "Reflection")