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  9. Q240

RRB Technician (Grade I Signal + Grade III) 2026 · Question 240 of 265

What happens to a ray of light that either passes through the principal focus (for a convex lens) or appears to meet at the principal focus (for a concave lens) before striking the lens?

  1. AIt always converges at the optical centre.
  2. BIt forms an image at the focal plane of the lens.
  3. CIt emerges parallel to the principal axis after refraction.Correct
  4. DIt bends randomly after refraction.

Answer: C. It emerges parallel to the principal axis after refraction.

Official answer key verified. Detailed explanation coming soon.

Source: RRB Technician Grade III 10-Mar-2026 Shift 3 (oliveboard compilation with answer key) · reliable-secondary

← Q239View full paper (265 questions)Q241 →

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