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Question: Answered & Verified by Expert
In case of reflection from curved surface
PhysicsRay OpticsJEE Main
Options:
  • A the normal is considered to be tangent to the spherical surface at the point of incidence
  • B the normal is considered to be drawn at the pole of the spherical surface only.
  • C the normal is the principal axis only.
  • D the normal is not required.
Solution:
2706 Upvotes Verified Answer
The correct answer is: the normal is considered to be tangent to the spherical surface at the point of incidence

The normal to the curved surface along the centre or radius of the spherical surface, i.e., the normal is considered to be tangent to the spherical surface at the point of incidence.

The geometrical centre of spherical surface is called pole, while in lens it is called optical centre.

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