What materials reflect radio waves?

Question:

Long Wavelength Waves:

Radio waves are electromagnetic waves that have a wavelength that is longer than infrared light in the electromagnetic spectrum. They are used for long-range communication.

Radio Telescopes:

• Because radio waves are the longest waves in the electromagnetic spectrum they also require the largest telescopes in order to be able to focus them and collect meaningful data.
• Because of their large size, the biggest radio telescopes are usually located in depressions in the ground where they can be supported and may measure up to 500 meters in diameter.
• Many of the radio telescopes on the Earth are interconnected with allows them to function as a single large radio telescpe with an aperture effectively equal to the diameter of the Earth.

Answer and Explanation: