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Assertion (A): Large raindrops return more power in the horizontal than in the vertical polarisation.
Reason (R): Aerodynamic forces flatten a falling drop into an oblate shape.

  • A.Both A and R are true, and R is the correct explanation of A
  • B.Both A and R are true, but R is not the correct explanation of A
  • C.A is true but R is false
  • D.A is false but R is true

Answer: A

Both are true and the reason gives the physics, and small drops remain nearly spherical. The differential reflectivity therefore reports the characteristic drop size in the sampled volume. This is the principal advantage of dual polarisation.

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