Which of the following is NOT an electromagnetic wave?
A. Infrared
B.Radio
C.Sound
D.X-ray
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Which of the following is NOT an electromagnetic wave?
A. Infrared
B.Radio
C.Sound
D.X-ray
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Answer:
The answer is letter C-sound.
Sound waves are longitudinal waves that pass through air or water as a medium. Sound is produced when a pressure wave is created due to object vibration. The pressure wave causes a vibrational motion in the surrounding. As the particles vibrate it transmits the sound through the medium. The human and animal ear detects sound waves when vibrating air particles enter the ear and recognize by the brain.