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Q: Which of the following point (s) always lie (s) on the principal axis of a lens? (i) Point of refraction (ii) Optical Centre (iii) Point of incidence
  • A. Both (i) and (iii)
  • B. Both (i) and (ii)
  • C. Only (ii)
  • D. Only (i)
Correct Answer: Option C - An axis is simply an imaginary line that differentiates different coordinates or quadrants, or it can be defined as an imaginary line that passes through a center of symmetry. In an optical system containing a lens, whether it be a convex or concave lens, is a line through which light can pass through a mirror un-deviated.
C. An axis is simply an imaginary line that differentiates different coordinates or quadrants, or it can be defined as an imaginary line that passes through a center of symmetry. In an optical system containing a lens, whether it be a convex or concave lens, is a line through which light can pass through a mirror un-deviated.

Explanations:

An axis is simply an imaginary line that differentiates different coordinates or quadrants, or it can be defined as an imaginary line that passes through a center of symmetry. In an optical system containing a lens, whether it be a convex or concave lens, is a line through which light can pass through a mirror un-deviated.