MP Board · Class 10 · Science · The Human Eye and Colourful WorldThe change in focal length of an eye lens is caused by the action of the:
📊Student Analytics & Stats
Total Attempts: 3
Accuracy Rate: 66.7%
Step-by-Step Solution
The change in focal length of the eye lens is caused by the action of the ciliary muscles. They alter the curvature and thickness of the flexible crystalline lens to focus objects at various distances.
Detailed Options Breakdown
Option : Pupil
Incorrect choice. This distractor represents a common misunderstanding of the core principles of The Human Eye and Colourful World.
Option 1: Retina
Incorrect choice. This distractor represents a common misunderstanding of the core principles of The Human Eye and Colourful World.
Option 2: Ciliary muscles (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 3: Iris
Incorrect choice. This distractor represents a common misunderstanding of the core principles of The Human Eye and Colourful World.
💡 Study Guide: This question tests core syllabus concepts from The Human Eye and Colourful World. For formulas, key summaries, and mock exam reference guides, read the full The Human Eye and Colourful World Revision Notes.