General Science • PhysicsMedium
Which of the following statements concerning electromagnetic waves is fundamentally accurate?
A. They require a material medium for propagation through space
B. They are longitudinal waves consisting of pressure oscillations
C. They consist of mutually perpendicular oscillating electric and magnetic fields✓ Correct Answer
D. They travel at varying speeds depending on the source frequency in a vacuum
💡 Solution & Explanation
Electromagnetic waves are transverse waves formed by oscillating electric and magnetic field vectors that are mutually perpendicular to each other and also perpendicular to the direction of wave propagation. They do not require any physical medium and propagate freely through a vacuum at a constant speed of light. Distractor choices claiming they are longitudinal or need a medium confuse them with mechanical waves like sound. All electromagnetic waves travel through a vacuum at the identical speed denoted by the symbol c.
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