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The Human Eye and the Colorful World — Class 10 CBSE Science MCQs with Solutions
Free Class 10 CBSE Science The Human Eye and the Colorful World MCQs with step-by-step solutions. Practise online on Prepizo — no login needed.
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Sample questions with solutions
Q1 — easy
Light enters human eye through a thin transparent front membrane called the:
A. Pupil
B. Cornea ✓ Correct
C. Iris
D. Retina
Solution: Cornea is the outer transparent protective layer.
Q2 — easy
Dark muscular diaphragm that controls the size of the pupil and regulates light entry into eye is:
A. Cornea
B. Iris ✓ Correct
C. Ciliary muscles
D. Retina
Solution: Iris adjusts pupil diameter.
Q3 — easy
Light-sensitive inner back screen of human eye where real inverted images form is the:
A. Cornea
B. Retina ✓ Correct
C. Sclera
D. Lens
Solution: Retina contains photoreceptor rods and cones.
Q4 — easy
Ability of human eye lens to adjust its focal length using ciliary muscles is called:
A. Adaptation
B. Power of accommodation ✓ Correct
C. Persistence of vision
D. Refraction
Solution: Accommodation adjusts lens curvature for near/far vision.
Q5 — easy
Near point of distinct vision for a normal young adult eye is approximately:
A. 10 cm
B. 25 cm ✓ Correct
C. 50 cm
D. Infinity
Solution: Least distance of distinct vision = 25 cm.
Q6 — easy
Far point of distinct vision for a normal human eye is:
A. 25 cm
B. 1 metre
C. 100 metres
D. Infinity ✓ Correct
Solution: Normal eye far point extends to infinity.
Q7 — easy
Eye defect Myopia (Nearsightedness) where distant objects appear blurry is corrected using a:
A. Convex lens
B. Concave lens ✓ Correct
C. Cylindrical lens
D. Bifocal lens
Solution: Diverging concave lens corrects myopic focus in front of retina.
Q8 — easy
Eye defect Hypermetropia (Farsightedness) where near objects appear blurry is corrected using a:
A. Concave lens
B. Convex lens ✓ Correct
C. Bifocal lens
D. Plano lens
Solution: Converging convex lens shifts hypermetropic focus forward onto retina.
Q9 — easy
Age-related vision defect Presbyopia caused by weakening of ciliary muscles is corrected using:
A. Concave lens only
B. Convex lens only
C. Bifocal lenses ✓ Correct
D. Cylindrical lenses
Solution: Bifocal lenses provide upper concave and lower convex correction.
Q10 — easy
Splitting of white sunlight into its constituent 7 colors upon passing through a glass prism is:
A. Reflection
B. Dispersion ✓ Correct
C. Scattering
D. Atmospheric refraction
Solution: Prisms cause wavelength-dependent dispersion.
Q11 — easy
Which color of visible spectrum suffers MAXIMUM deviation/bending when passing through a prism?
A. Red
B. Violet ✓ Correct
C. Yellow
D. Green
Solution: Violet light has shortest wavelength and refracts most.
Q12 — easy
Which color of visible spectrum suffers MINIMUM deviation when passing through a prism?
A. Red ✓ Correct
B. Violet
C. Blue
D. Green
Solution: Red light has longest wavelength and refracts least.
Q13 — easy
Twinkling of stars in night sky is caused by:
A. Dispersion of light
B. Atmospheric refraction of starlight ✓ Correct
C. Scattering of light
D. Total internal reflection
Solution: Refractive index fluctuations in air cause starlight refraction.
Q14 — easy
Blue color of clear sky and reddish appearance of Sun at sunrise/sunset are caused by:
A. Atmospheric refraction
B. Scattering of light (Rayleigh scattering) ✓ Correct
C. Dispersion of light
D. Reflection
Solution: Shorter blue wavelengths scatter more; longer red wavelengths penetrate atmosphere at horizon.
Q15 — easy
Advance sunrise and delayed sunset (by ~2 minutes each) occur due to:
A. Atmospheric refraction ✓ Correct
B. Scattering of light
C. Dispersion
D. Reflection
Solution: Atmospheric refraction bends sunlight around Earth's horizon.