Define the term power of accommodation. Write the modification in the curvature of the eye lens which enables us to see the nearby objects clearly?
Define the term power of accommodation. Write the modification in the curvature of the eye lens which enables us to see the nearby objects clearly?
Official answer
The power of accommodation of the eye is the ability of the eye to see objects clearly at a distance of 25 cm to infinity. The curvature of the eye lens is modified by the ciliary muscles to see nearby objects clearly. When the ciliary muscles contract, the eye lens becomes thicker, and its focal length decreases, enabling us to see nearby objects clearly.
Marking scheme
- 1./2 for definition
- 2./1 for modification in curvature
Hint
The eye lens is composed of a fibrous, jelly-like material. Its curvature can be modified to some extent by the ciliary muscles.
Quick oral answer
The power of accommodation of the eye is the ability of the eye to see objects clearly at a distance of 25 cm to infinity. The curvature of the eye lens is modified by the ciliary muscles to see nearby objects clearly.
Common mistakes
- 1.confusing power of accommodation with power of vision
Analysis and explanation
The power of accommodation of the eye is the ability of the eye to see objects clearly at a distance of 25 cm to infinity. The curvature of the eye lens is modified by the ciliary muscles to see nearby objects clearly. When the ciliary muscles contract, the eye lens becomes thicker, and its focal length decreases, enabling us to see nearby objects clearly.
Interesting facts
The power of accommodation of the eye is the ability of the eye to see objects clearly at a distance of 25 cm to infinity.
Question details
Q5 of 37 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2019
- Section
- Section B
- Marks
- 2
- Type
- Short Answer
- Chapter
- The Human Eye and the Colourful World
- Topic
- The Human Eye
- Bloom's level
- Remembering
- Syllabus topic
- Power of Accommodation
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2019?
This question carries 2 marks in the CBSE Class 10 Science 2019 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 2019 paper?
This is a Short Answer question from Section B in the CBSE Class 10 Science 2019 paper.