Which among the given waves cannot be polarised -

[ A ]    Infrared
[ B ]    Radio
[ C ]    Ultra violet
[ D ]    Ultrasonic right
Answer : Option D
Explanation :
Only transverse waves (such as radio, ultraviolet & infrared waves) can be polarized since their vibrations can potentially occur in all directions perpendicular to the direction of travel. It is so possible to confine the vibrations to a single plane. However, sound waves are longitudinal in which vibrations are parallel to the direction of travel of the wave. The vibrations of a longitudinal wave occur along a single line, it is so not possible to confine that to a plane. So it cannot be polarized.
General Science MCQ Questions and Answers for competitive exams

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