Which of the following is an electromagnetic wave?
A) Microwave
B) Gravitational wave
C) Cosmic-ray proton
D) Sound wave

Question

Quizplus · Accepted Answer

Electromagnetic waves are transverse waves consisting of oscillating electric and magnetic fields perpendicular to each other, and the only option that corresponds to this definition is the microwave, which is a type of electromagnetic wave. 
Option B is incorrect as gravitational waves are ripples in the fabric of spacetime caused by massive celestial events, and they do not have oscillating electric and magnetic fields. 
Option C is incorrect as cosmic-ray protons are high-energy particles, but they are not classified as electromagnetic waves. 
Option D is incorrect as sound waves are mechanical waves that require a medium to travel through, and they do not consist of oscillating electric and magnetic fields.

Which of the Following Is an Electromagnetic Wave