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13. Which of the following best describes radio waves?
a. It is a sound wave used for short distance communication.
b. It is a sound wave with the highest frequency.
c. It is an electromagnetic wave with the longest wavelength used for
long distance communication.
d. It is an electromagnetic wave with the shortest wavelength used for
long distance communication.​


Sagot :

Answer:

c. It is an electromagnetic wave with the longest wavelength used for

long distance communication.

Answer:

C po.

Explanation:

It is an electromagnetic wave with the longest wavelength used for long distance communication.