The Human Eye and the Colourful World — Class 10 MCQs with Answers
Class 10 CBSE Science (Physics) · Chapter 10
90 practice questions · 30 Easy · 30 Medium · 30 Hard · Updated
Practise the most important Class 10 CBSE Science (Physics) questions from Chapter 10, "The Human Eye and the Colourful World". You get 9 timed quizzes made from 90 NCERT-based MCQs, with answers and explanations. The questions are split into 30 Easy, 30 Medium and 30 Hard. Warm up on the basics, then move on to the exam-level questions that set top scorers in CBSE Board exams and the JEE & NEET foundation years apart.
To score well in "The Human Eye and the Colourful World", focus on clear concepts in physics, chemistry and biology basics. Each MCQ here is timed and uses exam-style marking (+4 correct, −1 wrong, 0 skipped). This trains you to stay accurate under time pressure, as real papers need. Every question has a short explanation, so a wrong answer becomes a quick lesson. It is the fastest way to fix gaps before a test.
Use this chapter for focused revision. Start with the Easy set to check your basics on The Human Eye and the Colourful World, then move to Medium and Hard to practise applying them. Your accuracy, streaks and XP save automatically. This chapter also adds to your overall Class 10 Science (Physics) mastery score. 14 sample questions are solved in full below, with the answer and a worked explanation. Sign in free to start practising.
Key concepts: The Human Eye and the Colourful World (Class 10 Science (Physics))
The eye is a natural optical instrument that focuses light onto the retina, and its defects are corrected with lenses. This chapter also explains the phenomena the atmosphere produces — dispersion into a spectrum, the rainbow, twinkling stars and the blue sky.
- Structure of the human eye
- Light passes through the cornea, aqueous humour, pupil and lens to form an image on the light-sensitive retina.
- Cornea and iris
- The cornea does most of the refraction, while the coloured iris controls the size of the pupil and hence the light entering.
- Retina and its cells
- The light-sensitive screen at the back of the eye, carrying rod cells for dim light and cone cells for bright light and colour.
- Power of accommodation
- The ciliary muscles change the eye lens's curvature so that objects at different distances can be focused sharply.
The Human Eye and the Colourful World — important questions & MCQs with answers (Class 10 Science (Physics))
14 solved questions from this chapter's difficulty levels, each with its answer and explanation. The other 76 are timed and scored when you sign in.
- Q1Easy
Image in human eye is formed on:
A.Retina✓ CorrectB.IrisC.CorneaD.PupilAnswer: A. Retina
Explanation: The retina is the light-sensitive screen at the back of the eye where the lens forms a real, inverted image, just as film does in a camera; the cornea and iris sit near the front and never carry the image.
- Q2Easy
The lens of the human eye is:
A.Convex (biconvex)✓ CorrectB.ConcaveC.PlaneD.CylindricalAnswer: A. Convex (biconvex)
Explanation: The eye lens is a convex (biconvex), transparent, flexible structure that converges light rays onto the retina; its curvature is what the ciliary muscles adjust during accommodation.
- Q3Easy
Ability of the eye to focus on objects at different distances is called:
A.RefractionB.AdaptationC.RecessionD.Accommodation✓ CorrectAnswer: D. Accommodation
Explanation: Accommodation is the eye's ability to change the focal length of its lens, via the ciliary muscles, so it can focus clearly on objects at both near and far distances.
- Q4Easy
Myopia is the defect in which:
A.Both appear blurredB.Near objects appear blurredC.Distant objects appear blurred✓ CorrectD.Both clearAnswer: C. Distant objects appear blurred
Explanation: In myopia, the image of a distant object forms in front of the retina instead of on it, so distant objects look blurred while near objects, focused normally, stay clear.
- Q5Easy
Splitting of white light into its colours is called:
A.AbsorptionB.ReflectionC.Refraction onlyD.Dispersion✓ CorrectAnswer: D. Dispersion
Explanation: Splitting white light into its constituent colours, as a prism does, is called dispersion; it happens because each colour (wavelength) bends by a slightly different amount.
- Q6Easy
Sky appears blue because:
A.Atmosphere is blueB.Blue light is scattered more than other colours✓ CorrectC.Sun is blueD.Ocean reflectsAnswer: B. Blue light is scattered more than other colours
Explanation: Shorter wavelengths like blue scatter far more strongly than longer ones such as red when sunlight hits air molecules (Rayleigh scattering), which is why the sky looks blue rather than white.
- Q7Medium
Myopia (near-sightedness) is corrected using:
A.Cylindrical lensB.Convex lensC.Bifocal lensD.Concave lens✓ CorrectAnswer: D. Concave lens
Explanation: Myopia means the image of a distant object forms in front of the retina because the eyeball is too long or the lens too curved; a concave (diverging) lens pushes the image back onto the retina.
- Q8Medium
Power of accommodation of the human eye is changed by:
A.Ciliary muscles changing the curvature of lens✓ CorrectB.IrisC.CorneaD.RetinaAnswer: A. Ciliary muscles changing the curvature of lens
Explanation: The ciliary muscles contract or relax to change the curvature — and hence focal length — of the eye lens, which is the physical basis of the eye's power of accommodation.
- Q9Medium
The ability of the eye lens to adjust its focal length is called its:
A.Power of resolutionB.Power of accommodation✓ CorrectC.Refractive indexD.Least distance of visionAnswer: B. Power of accommodation
Explanation: The ability of the eye lens to adjust its focal length so as to focus objects at different distances is called the power of accommodation.
- Q10Medium
Myopia can be caused by:
A.Lens flattenedB.Eyeball too shortC.Eyeball elongated or excessive curvature of lens✓ CorrectD.Cornea flatAnswer: C. Eyeball elongated or excessive curvature of lens
Explanation: Myopia arises when the eyeball is too long, or the lens too strongly curved, so the converging power is excessive and a distant object's image forms in front of, not on, the retina.
- Q11Medium
Different colours have different refractive indices in glass. Highest n is for:
A.Violet✓ CorrectB.RedC.GreenD.YellowAnswer: A. Violet
Explanation: Violet has the shortest wavelength, so glass has the highest refractive index for it, making violet bend the most.
- Q12Hard
Yellow spot (fovea) of the retina is the region of:
A.Blind spotB.Sharpest vision (densely packed cones)✓ CorrectC.VitreousD.CorneaAnswer: B. Sharpest vision (densely packed cones)
Explanation: The yellow spot, or fovea, is a small retinal region packed densely with cones, giving it the sharpest, most detailed vision; that's why we turn our eyes to focus an object exactly there.
- Q13Hard
Image on retina is formed by:
A.Cornea onlyB.Lens onlyC.Refraction at cornea (main) and lens (fine adjustment)✓ CorrectD.Iris onlyAnswer: C. Refraction at cornea (main) and lens (fine adjustment)
Explanation: Most bending happens at the cornea, with the eye lens making fine focal-length adjustments; together they form the image on the retina.
- Q14Hard
A person needs spectacles with bifocal lenses. The lower part is:
A.ConcaveB.Convex (for reading)✓ CorrectC.PlaneD.CylindricalAnswer: B. Convex (for reading)
Explanation: The lower half of a bifocal lens is convex, converging light more strongly for close-up reading — the same fix used for hypermetropia — while the upper half stays concave for distance vision.
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Start this chapter free →The Human Eye and the Colourful World — FAQs
What are the key concepts in Class 10 Science (Physics) The Human Eye and the Colourful World?+
The eye is a natural optical instrument that focuses light onto the retina, and its defects are corrected with lenses. This chapter also explains the phenomena the atmosphere produces — dispersion into a spectrum, the rainbow, twinkling stars and the blue sky. Key ideas include Structure of the human eye, Cornea and iris, Retina and its cells, Power of accommodation.
What does Class 10 Science (Physics) Chapter 10 (The Human Eye and the Colourful World) cover on XamBaaz?+
It has 90 NCERT-based MCQs on "The Human Eye and the Colourful World": 30 Easy, 30 Medium and 30 Hard. Together they make 9 timed quizzes, and you never get the same set twice. Every question has an instant explanation. They help you prepare for CBSE Board exams and the JEE & NEET foundation years.
Are these "The Human Eye and the Colourful World" questions free to practise?+
Yes. Sign in with Google to practise "The Human Eye and the Colourful World" free. Full unlimited access is ₹999/year on a launch offer until 1 December 2026. No chapter is charged separately.
How should I revise "The Human Eye and the Colourful World" for the exam?+
Start with the Easy quiz to check your basics, then try Medium and Hard to practise applying them. There are 9 timed quizzes on this chapter, so you can come back for a fresh set instead of one you have seen. Read each explanation, retry the questions you miss, and track your accuracy until it stays high.
Are these "The Human Eye and the Colourful World" MCQs available with answers?+
Yes. 14 sample questions are shown here in full, each with the correct option and a step-by-step "Why" explanation. Sign in free with Google to start practising, with instant scoring.
Is there negative marking in the "The Human Eye and the Colourful World" quizzes?+
Yes. The timed quizzes use exam-style marking: +4 for a right answer, −1 for a wrong one and 0 for a skip. MHT-CET and CBSE board papers have no negative marking. Our mocks for those are scored their way.
What are the important questions from The Human Eye and the Colourful World (Class 10 Science (Physics))?+
The questions that matter most test Structure of the human eye, Cornea and iris, Retina and its cells, Power of accommodation. This page shows 14 solved important MCQs with answers and explanations; all 90 questions on the chapter are available as timed quizzes once you sign in.
Is there an online quiz for The Human Eye and the Colourful World?+
Yes — Class 10 Science (Physics) The Human Eye and the Colourful World has timed online quizzes at Easy, Medium and Hard levels, with instant scoring and a worked explanation on every question. The first quiz on the chapter is free.