✓ Board-verified↻ asked 3×
Science · 2026 · 2 marks
CBSE 2026 · Region 5 · Set 1 · Q34
(A)How does the change in curvature of the eye lens helps us in the process of seeing the nearby objects clearly?(ii)State the range of the power of accommodation of a normal human eye.Draw a ray diagram to show the correction of eye defect of an old man who can not see an object placed closer than $\displaystyle 1$ m from his eye, clearly.
(A)
How does the change in curvature of the eye lens helps us in the process of seeing the nearby objects clearly?
(ii)
State the range of the power of accommodation of a normal human eye.
Draw a ray diagram to show the correction of eye defect of an old man who can not see an object placed closer than $\displaystyle 1$ m from his eye, clearly.
Marking-scheme solution
(A)
While looking at objects nearer to eye, the curvature of the eye lens increases. Consequently, the focal length of the eye lens decreases.
(ii)
From 25cm (near point) to infinity (far point)
PAGI
(Deduct $\displaystyle \frac{1}{2}$ mark for no
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×
- A narrow beam XY of white light is passing through a glass prism ABC as shown in the diagram: Trace it on…2023 · asked 3×
- When a beam of white light passes through a region having very fine dust particles, the colour of light…2024 · asked 3×
- Give reasons: (i) The sky appears dark to passengers flying at very high altitude. (ii) 'Danger' signal…2025 · asked 3×
- Observe the following diagram showing an image formation in an eye: Identify the defect of vision shown in…2023 · asked 3×
- The colour of light for which the refractive index of glass is minimum, is:2024 · asked 3×
- Observe the following diagram and answer the questions following it: (i) Identify the defect of vision shown.…2023 · asked 3×
- Two green plants are kept separately in oxygen free containers, one in the dark and other in sunlight. It was…2023 · asked 3×
CBSE Class 10 Science past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.