Assertion (A): When ciliary muscles contract, eye lens becomes thin.
Reason (R): Ciliary muscles control the power of the eye lens.
Assertion (A): When ciliary muscles contract, eye lens becomes thin.
Reason (R): Ciliary muscles control the power of the eye lens.
Options
Official answer
Assertion (A) is false, but Reason (R) is true.
Marking scheme
- 1.1 mark
Hint
Think about the role of ciliary muscles in controlling the shape of the eye lens.
Quick oral answer
Assertion (A) is false, but Reason (R) is true.
Common mistakes
- 1.Confusing the effect of ciliary muscle contraction on the eye lens.
Analysis and explanation
The ciliary muscles play a crucial role in controlling the shape of the eye lens, which affects the power of the eye lens. However, when the ciliary muscles contract, the eye lens becomes thicker, not thinner.
Interesting facts
The ciliary muscles are responsible for changing the shape of the eye lens to focus on objects at different distances.
Question details
Q20 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2025
- Section
- Section A
- Marks
- 1
- Type
- MCQ
- Chapter
- The Human Eye and the Colourful World
- Topic
- The Human Eye
- Bloom's level
- Understanding
- Syllabus topic
- The Human Eye
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2025?
This question carries 1 mark in the CBSE Class 10 Science 2025 examination.
Which chapter does this question come from in Science?
This question is from the chapter "The Human Eye and the Colourful World" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "The Human Eye" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2025 paper?
This is a MCQ question from Section A in the CBSE Class 10 Science 2025 paper.