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Science (086) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [1] straightforward initial-understanding
Which of the following correctly describes what happens to a ray of light that strikes a concave mirror after travelling parallel to its principal axis? (A) It passes through the centre of curvature C. (B) It reflects back along the same path. (C) It passes through the principal focus F after reflection. (D) It emerges parallel to the principal axis after reflection.
  1. A It passes through the centre of curvature C.
  2. B It reflects back along the same path.
  3. C It passes through the principal focus F after reflection.
  4. D It emerges parallel to the principal axis after reflection.
Generated by claude-sonnet-4-6 · 2026-06-26 01:10 · grounding rag
Model Answer

(C) It passes through the principal focus F after reflection.

A ray parallel to the principal axis, after reflection from a concave mirror, passes through the principal focus F.

Explanation

This is a standard rule for ray diagrams of concave mirrors (Section 9.2.2, point i). Note that option (B) describes a ray through the centre of curvature C, and option (D) describes the reverse ray (through F → emerges parallel), so don't confuse them.

Source: Chapter 9, Section 9.2.2

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.