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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 exam-ready
When a ray of light passes through the optical centre of a lens, it: (A) Bends towards the principal axis (B) Bends away from the principal axis (C) Passes through the principal focus (D) Emerges without any deviation
  1. A Bends towards the principal axis
  2. B Bends away from the principal axis
  3. C Passes through the principal focus
  4. D Emerges without any deviation
Generated by claude-sonnet-4-6 · 2026-06-26 01:11 · grounding rag
Model Answer

(D) Emerges without any deviation

A ray of light passing through the optical centre of a lens emerges without any deviation.

Source: Chapter 9, Section 9.3.5

Explanation

This is a standard ray diagram rule for lenses. The three rules for ray diagrams are: (i) parallel ray → passes through F₂, (ii) ray through F₁ → emerges parallel, (iii) ray through optical centre → no deviation. Examiners expect option D directly; briefly quoting the rule earns full marks.

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