CBSE 2025 · Region 3 · Set 2 · Q31 · 3 marks
A person has to keep reading material much beyond $\displaystyle 25$ cm (say at $\displaystyle 50$ cm) from the eye for comfortable reading. Name the defect of vision he is suffering from. List two causes responsible for arising of this defect. Draw a labelled diagram showing correction of this defect using eye-glasses. Are these glasses convergent or divergent of light ?
Marking-scheme solution
Hypermetropia/ far-sightedness
(i) Focal length of the eye lens is too long
(ii) Eye ball has become too small/shortened
Convergent of light
The Human Eye and the Colourful WorldDefects of Vision and their CorrectionUnderstandshort_answermedium
More from The Human Eye and the Colourful World
- A person allowed a narrow beam of white light from the sun to enter a dark room through a small aperture and…2025 · asked 3×
- Give reasons: (i) The sky appears dark to passengers flying at very high altitude. (ii) 'Danger' signal…2025 · asked 3×
- A student has difficulty in reading his textbooks but can read the blackboard clearly while sitting in the…2025 · asked 3×
- The students in a class took a thick sheet of cardboard and made a small hole in its centre. Sunlight was…2025 · asked 3×
- Draw a ray diagram to show the refraction of a ray of light passing through an equilateral glass prism. Mark…2025 · asked 3×
- Assertion: When ciliary muscles contract, eye lens becomes thin. Reason (R): Ciliary muscles control the…2025 · asked 2×
- A person uses lenses of +2.0 D power in his spectacles for the correction of his vision. Name the defect of…2025 · asked 2×
- When a beam of white light passes through a region of very fine dust particles, the colour of light that…2025 · asked 2×
CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.