SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions | Assam Eduverse
SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions are prepared to strengthen understanding of vision and optical phenomena for the HSLC examination. These SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions include theory-based questions, numerical problems, diagram-based questions, previous year questions (PYQs), and important MCQs.
The SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions strictly follow the latest SEBA (ASSEB) syllabus for 2026–27. Since students must answer 45 MCQs in the HSLC Science examination, practising MCQs from SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions is essential.
Topics covered in SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions include structure of human eye, defects of vision, correction of defects, dispersion of light, scattering of light, atmospheric refraction, and formation of rainbow. Students searching for HSLC Science Chapter 11 Human Eye and the Colourful World Important Questions or SEBA Class 10 Science Chapter 11 PYQs will find this resource highly useful.
SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Questions with PYQs and MCQs
Table of Contents
A. Previous Year Questions with Answers
Q1. The least distance of distinct vision for a adult with normal vision is about — [HSLC 2019]
(i) 25 m
(ii) 2.5 cm
(iii) 25 cm
(iv) 2.5 m
Answer: (iii) 25 cm
Q2. The change in focal length of an eye lens is caused by the action of the [HSLC 2020]
(i) pupil
(ii) retina
(iii) ciliary muscles
(iv) iris
Answer: (iii) ciliary muscles
Q3. The formation of rainbow — [HSLC 2022]
(i) occurs in the same direction of the sun
(ii) occurs in the opposite direction of the sun
(iii) does not depend on the direction of the sun
(iv) none of the above
Answer: (ii) occurs in the opposite direction of the sun
Q4. Which of the following is responsible for change in the curvature of eye lenses? [HSLC 2023]
(i) Retina
(ii) Iris
(iii) Ciliary muscles
(iv) Optic nerve
Answer: (iii) Ciliary muscles
Q5. A boy is unable to see objects when they are placed 17 cm from his eye but can see objects beyond 40 cm from his eye. This defect can be corrected by using [HSLC 2024]
(A) convex lens
(B) concave lens
(C) bifocal lens
(D) contact lens
Answer: (A) convex lens
Q6. The human eye forms the image of an object at its [HSLC 2024]
(A) iris
(B) pupil
(C) retina
(D) cornea
Answer: (C) retina
Q7. Why is the colour of the clear sky blue? [HSLC 2024]
(A) Due to reflection of light
(B) Due to refraction of light
(C) Due to scattering of light
(D) Due to atmospheric layers
Answer: (C) Due to scattering of light
Q8. Which option justifies that the sun appears red at sunrise and sunset? [HSLC 2025]
(a) Red colour is scattered highest by the atmosphere
(b) The distance between the sun and the earth reduces
(c) Red colour has high wavelength, so it travels longer distance
(d) The white light disperses into seven colours, only red enters the atmosphere
Answer: (c) Red colour has high wavelength, so it travels longer distance
Q9. Identify the defect of vision of a person went for a medical checkup and found that the curvature of his eye lens is increasing. [HSLC 2025]
(a) Myopia
(b) Cataract
(c) Presbyopia
(d) Hypermetropia
Answer: (a) Myopia
Q10. A person cannot see objects clearly kept beyond 2 m. This defect can be corrected by using a lens of power [HSLC 2025]
(a) –0·5 D
(b) +0·5 D
(c) –0·2 D
(d) +0·2 D
Answer: (a) –0·5 D
B. Extra Questions with Answers
Q.1 The ability of the eye to focus both near and distant objects by adjusting its focal length is called —
(i) Power of lens
(ii) Accommodation
(iii) Dispersion
(iv) Scattering
Answer: (ii) Accommodation.
Q.2 The minimum distance at which objects can be seen most distinctly without strain by a normal eye is —
(i) 2.5 cm
(ii) 25 cm
(iii) 2.5 m
(iv) 25 m
Answer: (ii) 25 cm.
Q.3 The far point of a normal human eye is —
(i) 25 cm
(ii) 2.5 m
(iii) Infinity
(iv) 1 m
Answer: (iii) Infinity.
Q.4 When we look at a nearby object, the eye lens becomes thicker because —
(i) ciliary muscles relax
(ii) ciliary muscles contract
(iii) iris contracts
(iv) pupil expands
Answer: (ii) ciliary muscles contract.
Q.5 In a myopic eye, the image of a distant object is formed —
(i) behind the retina
(ii) on the retina
(iii) in front of the retina
(iv) at the cornea
Answer: (iii) in front of the retina.
Q.6 Myopia can be corrected by using a —
(i) Convex lens
(ii) Concave lens
(iii) Cylindrical lens
(iv) Bifocal lens
Answer: (ii) Concave lens.
Q.7 In hypermetropia, the image of a nearby object is formed —
(i) in front of the retina
(ii) on the retina
(iii) behind the retina
(iv) at the iris
Answer: (iii) behind the retina.
Q.8 Hypermetropia can be corrected by using a —
(i) Concave lens
(ii) Convex lens
(iii) Plane mirror
(iv) Prism
Answer: (ii) Convex lens.
Q.9 The splitting of white light into its component colours on passing through a prism is called —
(i) Refraction
(ii) Reflection
(iii) Dispersion
(iv) Scattering
Answer: (iii) Dispersion.
Q.10 Assertion (A): The red colour of light bends the least while passing through a prism.
Reason (R): Different colours of light bend through different angles because they have different wavelengths.
(i) Both A and R are true and R is the correct explanation of A
(ii) Both A and R are true but R is not the correct explanation of A
(iii) A is true but R is false
(iv) A is false but R is true
Answer: (i) Both A and R are true and R is the correct explanation of A.
Q.11 The band of coloured components of a light beam obtained after dispersion is called —
(i) Image
(ii) Spectrum
(iii) Shadow
(iv) Halo
Answer: (ii) Spectrum.
Q.12 The sequence of colours obtained in the spectrum of white light is remembered by the acronym —
(i) ROYGBIV
(ii) VIBGYOR
(iii) RGBYVIO
(iv) YORVIBG
Answer: (ii) VIBGYOR.
Q.13 The red colour of the spectrum bends the least because it has —
(i) minimum wavelength
(ii) minimum speed
(iii) maximum wavelength
(iv) maximum frequency
Answer: (iii) maximum wavelength.
Q.14 In a rainbow, the water droplets act as small —
(i) Mirrors
(ii) Lenses
(iii) Prisms
(iv) Screens
Answer: (iii) Prisms.
Q.15 A rainbow is always formed —
(i) in the direction of the Sun
(ii) opposite to the direction of the Sun
(iii) above the Sun
(iv) at noon only
Answer: (ii) opposite to the direction of the Sun.
Q.16 The twinkling of stars is due to —
(i) dispersion of light
(ii) scattering of light
(iii) atmospheric refraction
(iv) total internal reflection
Answer: (iii) atmospheric refraction.
Q.17 Assertion (A): The apparent position of a star is slightly higher than its actual position when viewed near the horizon.
Reason (R): The atmosphere bends starlight towards the normal.
(i) Both A and R are true and R is the correct explanation of A
(ii) Both A and R are true but R is not the correct explanation of A
(iii) A is true but R is false
(iv) A is false but R is true
Answer: (i) Both A and R are true and R is the correct explanation of A.
Q.18 The Sun appears reddish at sunrise and sunset because —
(i) red light is scattered the most
(ii) blue light is scattered the least
(iii) shorter wavelengths are scattered away
(iv) the Sun produces more red light
Answer: (iii) shorter wavelengths are scattered away.
Q.19 Why do planets not twinkle?
(i) They are very far
(ii) They are point-sized sources
(iii) They are extended sources
(iv) They emit their own light
Answer: (iii) They are extended sources.
Q.20 Match the following and choose the correct option:
A. Myopia
B. Hypermetropia
C. Presbyopia
D. Dispersion
- Splitting of white light
- Image formed behind retina
- Image formed in front of retina
- Decrease in power of accommodation with age
(i) A-3, B-2, C-4, D-1
(ii) A-2, B-3, C-4, D-1
(iii) A-3, B-4, C-2, D-1
(iv) A-1, B-2, C-3, D-4
Answer: (i) A-3, B-2, C-4, D-1.
Q.21 The retina of the human eye acts as a —
(i) lens
(ii) mirror
(iii) light-sensitive screen
(iv) aperture
Answer: (iii) light-sensitive screen.
Q.22 The light-sensitive cells present on the retina are —
(i) rods only
(ii) cones only
(iii) rods and cones
(iv) ciliary muscles
Answer: (iii) rods and cones.
Q.23 The iris controls the amount of light entering the eye by regulating the size of the —
(i) retina
(ii) cornea
(iii) pupil
(iv) optic nerve
Answer: (iii) pupil.
Q.24 The image formed by the eye lens on the retina is —
(i) virtual and erect
(ii) real and erect
(iii) virtual and inverted
(iv) real and inverted
Answer: (iv) real and inverted.
Q.25 Cataract is a condition in which —
(i) the retina is damaged
(ii) the eye lens becomes milky and cloudy
(iii) the pupil enlarges permanently
(iv) the cornea becomes opaque
Answer: (ii) the eye lens becomes milky and cloudy.
Q.26 Assertion (A): A normal eye can see objects clearly between 25 cm and infinity.
Reason (R): The far point of a normal eye is infinity and the near point is about 25 cm.
(i) Both A and R are true and R is the correct explanation of A
(ii) Both A and R are true but R is not the correct explanation of A
(iii) A is true but R is false
(iv) A is false but R is true
Answer: (i) Both A and R are true and R is the correct explanation of A.
Q.27 When light passes from air into glass through a prism, it bends —
(i) away from the normal
(ii) towards the normal
(iii) parallel to the surface
(iv) without deviation
Answer: (ii) towards the normal.
Q.28 The angle between the incident ray produced forward and the emergent ray in a prism is called the —
(i) angle of incidence
(ii) angle of refraction
(iii) angle of deviation
(iv) angle of prism
Answer: (iii) angle of deviation.
Q.29 The scattering of light by colloidal particles in the atmosphere is known as —
(i) dispersion
(ii) refraction
(iii) Tyndall effect
(iv) reflection
Answer: (iii) Tyndall effect.
Q.30 Match the following and choose the correct option:
A. Cornea
B. Ciliary muscles
C. Pupil
D. Retina
- Controls amount of light entering the eye
- Most of the refraction of light occurs here
- Adjusts curvature of eye lens
- Forms image on light-sensitive surface
(i) A-2, B-3, C-1, D-4
(ii) A-3, B-2, C-1, D-4
(iii) A-2, B-1, C-3, D-4
(iv) A-4, B-3, C-1, D-2
Answer: (i) A-2, B-3, C-1, D-4.
Q.31 The horizontal field of view of a human being with two eyes is about —
(i) 90°
(ii) 120°
(iii) 150°
(iv) 180°
Answer: (iv) 180°.
Q.32 When a person enters a dimly lit room from bright sunlight, the pupil —
(i) contracts to allow less light
(ii) expands to allow more light
(iii) becomes opaque
(iv) does not change
Answer: (ii) expands to allow more light.
Q.33 The optic nerve carries —
(i) light rays to the retina
(ii) electrical signals to the brain
(iii) blood to the eye
(iv) images to the cornea
Answer: (ii) electrical signals to the brain.
Q.34 Presbyopia occurs due to —
(i) elongation of eyeball
(ii) excessive curvature of lens
(iii) weakening of ciliary muscles and loss of flexibility of lens
(iv) damage to retina
Answer: (iii) weakening of ciliary muscles and loss of flexibility of lens.
Q.35 A person suffering from both myopia and hypermetropia is generally advised to use —
(i) concave lens only
(ii) convex lens only
(iii) bifocal lenses
(iv) prism lenses
Answer: (iii) bifocal lenses.
Q.36 In the experiment of dispersion using a prism, the colour observed at the top of the spectrum is —
(i) Red
(ii) Violet
(iii) Yellow
(iv) Green
Answer: (ii) Violet.
Q.37 Assertion (A): The sky appears dark to passengers flying at very high altitudes.
Reason (R): Scattering of light is not prominent at such heights.
(i) Both A and R are true and R is the correct explanation of A
(ii) Both A and R are true but R is not the correct explanation of A
(iii) A is true but R is false
(iv) A is false but R is true
Answer: (i) Both A and R are true and R is the correct explanation of A.
Q.38 The apparent advance sunrise and delayed sunset are due to —
(i) dispersion of light
(ii) atmospheric refraction
(iii) scattering of light
(iv) reflection of light
Answer: (ii) atmospheric refraction.
Q.39 Total internal reflection occurs when light travels —
(i) from rarer to denser medium
(ii) from denser to rarer medium
(iii) from air to water only
(iv) only in vacuum
Answer: (ii) from denser to rarer medium.
Q.40 Match the following and choose the correct option:
A. Myopia
B. Hypermetropia
C. Tyndall effect
D. Rainbow
- Scattering of light by colloidal particles
- Image formed in front of retina
- Natural spectrum in the sky
- Image formed behind retina
(i) A-2, B-4, C-1, D-3
(ii) A-4, B-2, C-1, D-3
(iii) A-2, B-3, C-4, D-1
(iv) A-1, B-2, C-3, D-4
Answer: (i) A-2, B-4, C-1, D-3.
Q.41 The angle between the two lateral faces of a prism is called the —
(i) angle of deviation
(ii) angle of incidence
(iii) angle of prism
(iv) angle of refraction
Answer: (iii) angle of prism.
Q.42 When light passes from glass to air through a prism, it bends —
(i) towards the normal
(ii) away from the normal
(iii) parallel to the surface
(iv) without refraction
Answer: (ii) away from the normal.
Q.43 The blue colour of the sky is due to —
(i) reflection of light
(ii) refraction of light
(iii) scattering of light
(iv) dispersion of light
Answer: (iii) scattering of light.
Q.44 The red light is least scattered in the atmosphere because it has —
(i) minimum frequency
(ii) minimum speed
(iii) maximum wavelength
(iv) maximum energy
Answer: (iii) maximum wavelength.
Q.45 When sulphur particles are formed in water during an experiment, the blue colour observed from the sides of the glass tank is due to —
(i) reflection of light
(ii) refraction of light
(iii) scattering of short wavelengths
(iv) total internal reflection
Answer: (iii) scattering of short wavelengths.
Q.46 The image distance in the eye remains fixed because the image is always formed on the —
(i) cornea
(ii) iris
(iii) retina
(iv) pupil
Answer: (iii) retina.
Q.47 Assertion (A): At noon, the Sun appears white.
Reason (R): Only a small amount of blue and violet light is scattered when the Sun is overhead.
(i) Both A and R are true and R is the correct explanation of A
(ii) Both A and R are true but R is not the correct explanation of A
(iii) A is true but R is false
(iv) A is false but R is true
Answer: (i) Both A and R are true and R is the correct explanation of A.
Q.48 The apparent flattening of the Sun’s disc at sunrise and sunset is due to —
(i) scattering of light
(ii) atmospheric refraction
(iii) dispersion of light
(iv) reflection of light
Answer: (ii) atmospheric refraction.
Q.49 Which of the following colours has the highest frequency in the visible spectrum?
(i) Red
(ii) Orange
(iii) Blue
(iv) Violet
Answer: (iv) Violet.
Q.50 During dispersion of white light through a prism, which colour deviates the most?
(i) Red
(ii) Yellow
(iii) Violet
(iv) Orange
Answer: (iii) Violet.
Q.51 A person needs a lens of power –5 D to correct his distant vision. What is the focal length of the lens?
(i) –0.2 m
(ii) 0.2 m
(iii) –5 m
(iv) 5 m
Answer: (i) –0.2 m.
Solution:
Power (P) = 1/f
f = 1/P = 1/(–5) = –0.2 m
Q.52 A lens has a focal length of +0.5 m. What is its power?
(i) +2 D
(ii) –2 D
(iii) +0.5 D
(iv) –0.5 D
Answer: (i) +2 D.
Solution:
P = 1/f = 1/0.5 = +2 D
Q.53 The far point of a myopic person is 50 cm. What is the power of the corrective lens required?
(i) –2 D
(ii) +2 D
(iii) –0.5 D
(iv) +0.5 D
Answer: (i) –2 D.
Solution:
Far point = 50 cm = 0.5 m
For correction, image should form at infinity.
P = –1/0.5 = –2 D
Q.54 The near point of a hypermetropic eye is 1 m. What is the power of the lens required to see objects clearly at 25 cm?
(i) +3 D
(ii) +4 D
(iii) –3 D
(iv) –4 D
Answer: (iii) +3 D.
Solution:
u = –0.25 m
v = –1 m
Using lens formula:
1/f = 1/v – 1/u
= (–1) – (–4) = 3
f = 1/3 m
P = +3 D
Q.55 A concave lens has a power of –4 D. What is its focal length?
(i) –0.25 m
(ii) +0.25 m
(iii) –4 m
(iv) +4 m
Answer: (i) –0.25 m.
Solution:
f = 1/P = 1/(–4) = –0.25 m
Q.56 A person cannot see objects beyond 2 m. What is the power of the lens required to correct his vision?
(i) –0.5 D
(ii) +0.5 D
(iii) –2 D
(iv) +2 D
Answer: (i) –0.5 D.
Solution:
Far point = 2 m
P = –1/2 = –0.5 D
Q.57 A lens of power +1.5 D is used for correcting near vision. What is its focal length?
(i) 0.67 m
(ii) –0.67 m
(iii) 1.5 m
(iv) –1.5 m
Answer: (i) 0.67 m.
Solution:
f = 1/P = 1/1.5 = 0.67 m
Q.58 A myopic person has far point at 80 cm. What is the required power of lens?
(i) –1.25 D
(ii) +1.25 D
(iii) –0.8 D
(iv) +0.8 D
Answer: (i) –1.25 D.
Solution:
Far point = 0.8 m
P = –1/0.8 = –1.25 D
Q.59 A convex lens has focal length 25 cm. What is its power?
(i) +4 D
(ii) –4 D
(iii) +0.25 D
(iv) –0.25 D
Answer: (i) +4 D.
Solution:
f = 25 cm = 0.25 m
P = 1/0.25 = +4 D
Q.60 The near point of a person is 50 cm. What power of lens is required to read a book at 25 cm?
(i) +2 D
(ii) +1 D
(iii) –2 D
(iv) –1 D
Answer: (i) +2 D.
Solution:
u = –0.25 m
v = –0.5 m
1/f = 1/v – 1/u
= (–2) – (–4) = 2
f = 1/2 m
P = +2 D
SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions for HSLC Exam 2026–27
The SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions provided here are prepared according to the latest SEBA (ASSEB) syllabus 2026–27. These SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions include conceptual MCQs, short answer questions, long answer questions, and numerical problems aligned with the HSLC exam pattern.
As per the latest HSLC structure, students must attempt 45 MCQs. Therefore, regular practice of SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions ensures strong preparation for MCQ-based and reasoning-type questions.
The SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions cover defects of vision such as myopia, hypermetropia, and presbyopia, correction using lenses, dispersion through prism, scattering of light, and atmospheric refraction. Continuous revision using SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions improves conceptual clarity and numerical accuracy.
These Class 10 Human Eye and the Colourful World Important Questions with MCQs are ideal for final revision. Consistent practice of SEBA Class 10 Science Chapter 11 Human Eye and the Colourful World Important Extra Questions strengthens exam confidence and scoring performance.
Frequently Asked Questions (FAQ)
1. Why is Chapter 11 Human Eye and the Colourful World important for HSLC exam?
This chapter explains defects of vision, correction using lenses, dispersion, and scattering of light frequently asked in HSLC Science exams.
2. How many MCQs are asked in HSLC Science exam?
Students must answer 45 MCQs as per the latest HSLC Science examination pattern.
3. Are MCQs included in Human Eye and the Colourful World important questions?
Yes, conceptual and numerical MCQs are included according to the updated HSLC exam structure.
4. Are these questions based on SEBA syllabus?
Yes, all questions are prepared strictly according to the latest SEBA (ASSEB) syllabus for 2026–27.
5. Do these include previous year questions?
Yes, previous year questions are included to help students understand HSLC exam trends.
6. Which topics are covered in Chapter 11?
Topics include structure of human eye, defects of vision, correction methods, dispersion, scattering, and atmospheric refraction.
7. Can practising these improve exam performance?
Yes, regular revision improves numerical accuracy, diagram clarity, and MCQ performance in the HSLC examination.
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