The Human Eye and the Colourful World

CBSE Class 10 Science · every board question from this chapter, 2025–2025 · 8 of them repeated across years

• Select the correct statement from the following:2025
• When a beam of white light passes through a region of very fine dust particles, the colour of light that scatters the most in…2025asked 2×
• The curvature of eye lens of human eye2025
• In the human eye, most of the refraction for the light rays entering the eye occurs at the surface of:2025
• The part of the human eye which can modify the curvature of the eye lens to some extent is:2025
• The white light entering a glass prism, gets split into its constituent colours. It is observed that:2025
• The possible way to restore clear vision of those people whose eyeball has elongated is the use of suitable2025
• Most of the refraction for the light rays entering the eye occurs at2025
• The part of human eye which controls the amount of light entering into it.2025
• An old person is suffering from an eye defect caused by weakening of ciliary muscles and diminishing flexibility of the eye lens.…2025
• A boy while reading a book, keeps it much beyond 25 cm from his eyes. This defect of vision has arised because of2025
• The phenomenon responsible for making the smoke particles visible when a beam of sunlight enters a smoke filled room through a…2025
• Assertion: When ciliary muscles contract, eye lens becomes thin. Reason (R): Ciliary muscles control the power of the eye lens.2025asked 2×
• Assertion: White light is dispersed by a glass prism into seven colours. Reason (R): The red light bends the least while the…2025
• Give reasons: (i) The sky appears dark to passengers flying at very high altitude. (ii) 'Danger' signal lights are red in colour.…2025asked 3×
• A student has difficulty in reading his textbooks but can read the blackboard clearly while sitting in the last row. Name the…2025asked 3×
• Draw a ray diagram to show the refraction of a ray of light passing through an equilateral glass prism. Mark the angle through…2025asked 3×
• (i) Study the diagram and name the parts marked as A, B, C and D. (ii) Write the function of A and C.2025
• A person is suffering from an eye defect in which the far point of the eye is much nearer than infinity. Name the defect of…2025
• What is a rainbow? Draw a labelled diagram to show its formation.2025
• A person has to keep reading material much beyond 25 cm (say at 50 cm) from the eye for comfortable reading. Name the defect of…2025
• A person uses lenses of +2.0 D power in his spectacles for the correction of his vision. Name the defect of vision the person is…2025asked 2×
• Draw a diagram to show the dispersion of white light by a glass prism. What is spectrum? Give reason for its formation.2025
• A person allowed a narrow beam of white light from the sun to enter a dark room through a small aperture and placed a glass prism…2025asked 3×
• The students in a class took a thick sheet of cardboard and made a small hole in its centre. Sunlight was allowed to fall on this…2025asked 3×

Answers come from CBSE’s own marking schemes. How we source them.