Question : Which of these waves can be polarised?
Option 1: Sound waves in the air
Option 2: Longitudinal waves on a string
Option 3: Transverse waves on a string
Option 4: Light waves
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Correct Answer: Light waves
Solution : The correct answer is Light waves .
Polarised waves can only be transverse waves. Sound waves in the air are longitudinal waves, which cannot be polarised. Only transverse waves can be polarised because they vibrate in all directions that are perpendicular to the direction of travel. Only because "light waves" are transverse and oscillate in more than one direction. It is not dependent on wavelength or frequency.
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