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Science (086) — CBSE Class 10 board question

Q1. [1] § 9.2.1 Image Formation by Spherical Mirrors § 9.2.2 Representation of Images Formed by Spherical Mirrors Using Ray Diagrams § 9.3.5 Image Formation in Lenses Using Ray Diagrams
Identify from the following the ray diagram which shows the correct path of the reflected ray for the ray incident on a concave mirror as shown :
  1. (A) Reflected ray diagram A
  2. (B) Reflected ray diagram B
  3. (C) Reflected ray diagram C
  4. (D) Reflected ray diagram D
Previously asked in CBSE board exam
2025 31/6/1 Q13
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Generated by claude-sonnet-4-6 · 2026-06-15 06:51 · grounding rag
Model Answer

(C)

A ray parallel to the principal axis, after reflection from a concave mirror, passes through the principal focus F. Hence, option (C) is correct.

Source: Chapter 9, Section 9.2.2 — Representation of Images Formed by Spherical Mirrors Using Ray Diagrams

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Explanation

The first standard rule for ray diagrams of concave mirrors states: a ray parallel to the principal axis, after reflection, must pass through the principal focus F. Options (A), (B), and (D) show the reflected ray missing F or going in the wrong direction, violating this rule. Examiners specifically test this rule, so always remember: parallel ray → reflects through F (concave mirror).

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