Question
Physics Question on Polarisation
Which of the following rays can be polarised?
A
Water wave and sound wave
B
Sound wave and radio wave
C
X-rays and water wave
D
Light wave and X-ray
Answer
Light wave and X-ray
Explanation
Solution
Only transverse waves can be polarised. Light waves and X-rays are transverse, hence the vibrations of the electric vector must occur in a plane perpendicular to the direction of propagation of light and hence, give rise to polarised light. Note: Longitudinal waves cannot be polarised.