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Science · 2023 · 3 marks
CBSE 2023 · Region 5 · Set 1 · Q31
(a) State one important function of the following parts of the human eye: (i) Retina (ii) Pupil (b) State the role of ciliary muscles in focussing…
(a)
State one important function of the following parts of the human eye :
(i)
Retina
(ii)
Pupil
(b)
State the role of ciliary muscles in focussing objects at varying distances from the eye.
Marking-scheme solution
(a) (i) Retina behaves like a light sensitive screen on which image of an object is formed.
(ii) Pupil : regulates and controls the amount of light entering the eye.
(b) When ciliary muscles relax or contract they change the curvature of eye lens and hence the focal length to focus objects at varying distances from the eye.
[Alternate answer of (b): It regulates the focal length or thickness of the lens.]All The Human Eye and the Colourful World questions2023 question paperNCERT solutions: The Human Eye and the Colourful WorldPractice The Human Eye and the Colourful World →
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CBSE Class 10 Science past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.