Question:
Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
Updated On: Jun 21, 2024
Hide Solution
Verified By Collegedunia
Approach Solution - 1
A normal eye is unable to clearly see the objects placed closer than 25 cm because the ciliary muscles of eyes are unable to contract beyond a certain limit.
If the object is placed at a distance less than 25 cm from the eye, then the object appears blurred and produces strain in the eyes.
Was this answer helpful?
1
2
Hide Solution
Verified By Collegedunia
Approach Solution -2
When the eye is focused on a closer object, the ciliary muscles are strained and the focal length of the eye-lens decreases. Because of some reason, the eye is not able to decrease the focal length beyond a limit, hence a normal eye is not able to see objects closer than 25 cm.
Was this answer helpful?
1
0
Top Questions on The Human Eye
- List two causes of this defect.
- CBSE Class X - 2025
- Science
- The Human Eye
- Determine the focal length of the lenses used in the spectacles.
- CBSE Class X - 2025
- Science
- The Human Eye
- A person uses lenses of power -0.5 D in his spectacles for the correction of his vision. (a) Name the defect of vision the person is suffering from.
- CBSE Class X - 2025
- Science
- The Human Eye
- What is a rainbow? 'We see a rainbow in the sky only after the rainfall.' Why?
- CBSE Class X - 2025
- Science
- The Human Eye
- The sky appears dark to passengers flying at very high altitude
- CBSE Class X - 2025
- Science
- The Human Eye
View More Questions
Questions Asked in CBSE X exam
- According to a popular quote – “Kindness is stronger than iron bars.”
Anil did not hand the thief over to the police. In what way did Anil’s act of wisdom and forgiveness transform Hari Singh?
(The Thief’s Story)- CBSE Class X - 2025
- Indian English Literature/Prose
- In a right triangle ABC, right-angled at A, if $\sin B = \dfrac{1}{4}$, then the value of $\sec B$ is
- CBSE Class X - 2025
- Trigonometry
- State two limitations of electrical impulses in multicellular organisms. Why is chemical communication better than electrical impulses as a means of communication between cells in multicellular organisms?
- CBSE Class X - 2025
- Organic Chemistry – Some Basic Principles and Techniques
आप अदिति / आदित्य हैं। आपकी दादीजी को खेलों में अत्यधिक रुचि है। ओलंपिक खेल-2024 में भारत के प्रदर्शन के बारे में जानकारी देते हुए लगभग 100 शब्दों में पत्र लिखिए।
- CBSE Class X - 2025
- पत्र लेखन
- Find length and breadth of a rectangular park whose perimeter is \(100 \, \text{m}\) and area is \(600 \, \text{m}^2\).
- CBSE Class X - 2025
- Mensuration
View More Questions