MCQs for Class 10 Science Chapter 11 Human Eye and Colourful World

Human Eye and the Colourful World helps students understand how the human eye works and how light creates different visual effects. The chapter covers defects of vision, refraction through a prism, dispersion of light, and atmospheric phenomena. Practicing Human Eye and Colourful World Class 10 MCQs helps students strengthen conceptual understanding and prepare for objective questions in CBSE Board exams.

Students can revise important concepts through MCQs and explore Class 10 Science MCQs for chapter-wise Science practice. For broader exam preparation, the Class 10 MCQs collection offers questions across subjects, while CBSE Board resources support revision based on the syllabus and exam pattern.

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MCQs for Class 10 Science Chapter 11 with Answers and Explanations 

Want to check how well you have prepared for Human Eye and the Colourful World? Try these Class 10 Science MCQs and test your knowledge. Before attempting the questions, revise the basic concepts of the chapter and focus on understanding the reason behind every answer. These MCQs will help you check your preparation level and improve accuracy for objective-type questions. 

Q1. Which part of the eye controls the amount of light entering the eye?

(A) Retina
(B) Iris
(C) Optic nerve
(D) Ciliary muscles

Answer: B

Explanation: The iris regulates the size of the pupil and controls the amount of light entering the eye.

Q2. The image formed on the retina is:

(A) Virtual and erect
(B) Real and erect
(C) Virtual and inverted
(D) Real and inverted

Answer: D

Explanation: The eye lens forms a real and inverted image on the retina.

Q3. The ability of the eye lens to change focal length is called:

(A) Persistence of vision
(B) Accommodation
(C) Dispersion
(D) Refraction

Answer: B

Explanation: Accommodation allows clear vision for objects at different distances.

Q4. Least distance of distinct vision for a normal eye is:

(A) 10 cm
(B) 15 cm
(C) 25 cm
(D) 50 cm

Answer: C

Explanation: For a normal adult eye, the near point is 25 cm.

Q5. Which defect causes distant objects to appear blurred?

(A) Hypermetropia
(B) Myopia
(C) Presbyopia
(D) Cataract

Answer: B

Explanation: In myopia, distant objects form images in front of the retina.

Q6. Myopia is corrected using:

(A) Convex lens
(B) Cylindrical lens
(C) Concave lens
(D) Bifocal lens

Answer: C

Explanation: A concave lens diverges light before it enters the eye.

Q7. Hypermetropia is corrected using:

(A) Concave lens
(B) Convex lens
(C) Plane mirror
(D) Prism

Answer: B

Explanation: A convex lens converges rays and helps focus images on the retina.

Q8. In hypermetropia, image of a nearby object forms:

(A) On retina
(B) Behind retina
(C) In front of retina
(D) At blind spot

Answer: B

Explanation: The eye lens cannot converge enough, so the image forms behind the retina.

Q9. Presbyopia mainly occurs due to:

(A) Retina damage
(B) Iris colour change
(C) Loss of lens flexibility
(D) Large pupil

Answer: C

Explanation: Age reduces the elasticity of the eye lens.

Q10. Which lens is commonly used for presbyopia?

(A) Concave
(B) Convex
(C) Bifocal
(D) Cylindrical

Answer: C

Explanation: Bifocal lenses help see both near and distant objects.

Q11. The retina acts like:

(A) Mirror
(B) Screen
(C) Prism
(D) Lens

Answer: B

Explanation: Images are formed on the retina like a screen.

Q12. Splitting of white light into colours is called:

(A) Reflection
(B) Refraction
(C) Dispersion
(D) Diffraction

Answer: C

Explanation: Dispersion occurs because different colours bend differently.

Q13. Which colour deviates the most through a prism?

(A) Red
(B) Yellow
(C) Green
(D) Violet

Answer: D

Explanation: Violet light has the shortest wavelength and bends most.

Q14. Which colour deviates the least through a prism?

(A) Red
(B) Blue
(C) Indigo
(D) Violet

Answer: A

Explanation: Red light has the longest wavelength and bends least.

Q15. The band of colours obtained after dispersion is called:

(A) Pattern
(B) Spectrum
(C) Halo
(D) Mirage

Answer: B

Explanation: The sequence of colours is known as the spectrum.

Q16. Rainbow formation involves:

(A) Reflection only
(B) Refraction only
(C) Dispersion only
(D) Refraction, dispersion and internal reflection

Answer: D

Explanation: All three phenomena occur inside raindrops.

Q17. The blue colour of the sky is due to:
(A) Reflection
(B) Dispersion
(C) Scattering of shorter wavelengths
(D) Refraction

Answer: C

Explanation: Blue light is scattered more strongly than red light.

Q18. Which colour is scattered the least?
(A) Blue
(B) Violet
(C) Red
(D) Indigo

Answer: C

Explanation: Red light has the longest wavelength.

Q19. Sun appears reddish at sunrise because:

(A) Red travels faster
(B) Red is scattered least
(C) Clouds reflect red
(D) Atmosphere is a mirror

Answer: B

Explanation: Most blue light gets scattered away.

Q20. Tyndall effect refers to:

(A) Reflection
(B) Scattering by fine particles
(C) Internal reflection
(D) Shadow formation

Answer: B

Explanation: It is the scattering of light by colloidal particles.

Q21. Stars twinkle due to:

(A) Changing brightness
(B) Atmospheric refraction
(C) Reflection
(D) Dispersion

Answer: B

Explanation: Atmospheric layers continuously refract starlight.

Q22. Planets generally do not twinkle because:

(A) Emit own light
(B) Are extended sources
(C) Are closer
(D) Are brighter

Answer: B

Explanation: Light from different parts averages out fluctuations.

Q23. Sun can be visible even when actually:

(A) Overhead
(B) Behind clouds
(C) Below horizon
(D) At zenith

Answer: C

Explanation: Atmospheric refraction makes the Sun appear higher.

Q24. Flattening of the Sun near horizon is due to:

(A) Reflection
(B) Atmospheric refraction
(C) Diffraction
(D) Dispersion

Answer: B

Explanation: Different parts of the Sun are refracted unequally.

Q25. Which structure connects eye to brain?

(A) Retina
(B) Iris
(C) Cornea
(D) Optic nerve

Answer: D

Explanation: The optic nerve carries visual signals to the brain.

Q26. Which part refracts most of the incoming light?

(A) Retina
(B) Cornea
(C) Iris
(D) Optic nerve

Answer: B

Explanation: The cornea provides most of the eye's focusing power.

Q27. A student sees near objects clearly but not distant ones. Defect?

(A) Hypermetropia
(B) Presbyopia
(C) Myopia
(D) Cataract

Answer: C

Explanation: This is a characteristic of myopia.

Q28. Correct order of spectrum colours is:

(A) VIBGYOR
(B) ROYGBIV
(C) RGBYIVO
(D) YORBGIV

Answer: B

Explanation: The spectrum begins with Red and ends with Violet.

Q29. Persistence of vision lasts approximately:

(A) 1 s
(B) 0.1 s
(C) 2 s
(D) 5 s

Answer: B

Explanation: The image remains on the retina for about one-tenth of a second.

Q30. Which phenomenon proves presence of tiny particles in air?

(A) Total internal reflection
(B) Tyndall effect
(C) Reflection
(D) Shadows

Answer: B

Explanation: Scattering of light reveals suspended particles.

Quick Chapter Overview

The chapter Human Eye and Colourful World explains how humans see objects and how different properties of light create natural phenomena around us. Students learn about the structure of the human eye, different vision problems, and their correction using suitable lenses.

The chapter also covers the behaviour of light when it passes through a prism, the formation of a spectrum, atmospheric refraction, and scattering of light. These concepts help explain common observations like the blue colour of the sky, rainbow formation, and the reddish appearance of the sun during sunrise and sunset.

Quick Revision Notes for Human Eye and Colourful World

Use these short notes before solving MCQs for faster revision.

• The retina is the screen of the eye where images are formed.
• The iris controls the size of the pupil and regulates the amount of light entering the eye.
• The ability of the eye lens to adjust its focal length is called power of accommodation.
• Myopia is corrected using a concave lens.
• Hypermetropia is corrected using a convex lens.
• A glass prism splits white light into seven colours due to dispersion of light.
• The band of seven colours formed after dispersion is called a spectrum.
• The sky appears blue because of the scattering of sunlight by air molecules.
• The sun appears reddish during sunrise and sunset because shorter wavelengths scatter away.

Smart Tips to Solve Human Eye and Colourful World MCQs

Follow these simple strategies while attempting Class 10 Science Chapter 11 MCQs:

• Understand the function of each part of the human eye instead of memorising names.
• Create a comparison table for different defects of vision.
• Remember lens corrections logically:
  • Myopia → Concave lens
  • Hypermetropia → Convex lens
• Practice diagram-based questions related to prism and eye defects.
• Connect atmospheric phenomena with daily examples.
• Read every option carefully because some choices may look very similar.

A strong understanding of concepts will always help more than remembering answers without logic.