Which of these statements is/are true? I. Water waves are longitudinal. II. Sound waves are transverse. III. Sound waves could be polarised. IV. Microwaves are transverse waves.*1 pointI and II onlyII and III onlyIV onlyAll of the above
Question
Which of these statements is/are true? I. Water waves are longitudinal. II. Sound waves are transverse. III. Sound waves could be polarised. IV. Microwaves are transverse waves.*1 pointI and II onlyII and III onlyIV onlyAll of the above
Solution
The correct answer is "IV only".
Here's why:
I. Water waves are not longitudinal, they are actually transverse waves. This is because the motion of the water particles is perpendicular to the direction of the wave.
II. Sound waves are not transverse, they are longitudinal waves. This is because the particles of the medium through which the sound is traveling vibrate in the same direction as the wave.
III. Sound waves cannot be polarised. Polarisation is a property of transverse waves, not longitudinal waves.
IV. Microwaves are indeed transverse waves. They are a type of electromagnetic wave, and all electromagnetic waves are transverse.
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