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NDA 2 2024 GAT, question 67

Topic: Physics

Q67

Which one among the following figures correctly represents the ray diagram ? (Consider the lens to be thin)

  1. (a) Option (a)
  2. (b) Option (b)
  3. (c) Option (c)
  4. (d) Option (d)Correct answer

Solution.

Answer: (d) Option (d)

  1. A ray through a thin lens's optical centre is undeviated.
  2. A ray directed through the object-side principal focus emerges parallel to the axis.
  3. Diagram (d) respects these rules and shows the inverted image at 2f for an object at 2f.
  4. The other diagrams violate at least one of these ray rules.