Which term describes a disturbance that transmits energy through a field?

• A. Energy
• B. Frequency
• C. Electromagnetic Waves
• D. Mechanical Waves

Answer: (C)

A disturbance that transmits energy through a field is an electromagnetic wave. These are fluctuations of electric and magnetic fields that travel through space, carrying energy with them. They don’t need a material medium, so they can move through vacuum, like sunlight or radio waves. The other ideas aren’t the same kind of description: energy is what the wave carries, not the kind of disturbance itself; frequency is about how often the field oscillates, not what kind of disturbance is propagating; mechanical waves also carry energy but require a material medium (air, water) to propagate, not a field. So electromagnetic waves are the disturbance in the electromagnetic field that transmits energy through space.