Electromagnetic and mechanical waves both transfer energy. How is an electromagnetic wave different from a mechanical wave?
Question 4 options:
a. An electromagnetic wave has frequency, and a mechanical wave does not.
b. An electromagnetic wave is made of atoms, and a mechanical wave is not.
c. An electromagnetic wave can travel in a vacuum, and a mechanical wave cannot.
d. Electromagnetic waves have frequencies that never change, and mechanical wave frequencies change.
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