MCQ
Which of the following cannot be polarized?
- AUltraviolet rays
- ✓Ultrasonic waves
- C$X-$rays
- DRadiowaves
✓
Answer
Correct option: B.
Ultrasonic waves
All the longitudinal waves like sound etc cannot be polarized because the motion of the particles is already in one dimension that is the direction of propagation of wave.
Thus all the transverse waves like electromagnetic waves can be polarized.
Thus, $(B)$ Ultrasonic waves being sound waves having frequency greater than $20\ kHz$ but being longitudinal in nature cannot be polarized
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