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Light — Class 8 CBSE Science MCQs with Solutions
Free Class 8 CBSE Science Light MCQs with step-by-step solutions. Practise online on Prepizo — no login needed.
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Sample questions with solutions
Q1 — easy
The bouncing back of light from a surface is called:
A. refraction
B. reflection ✓ Correct
C. dispersion
D. absorption
Solution: Reflection is light bouncing back.
Q2 — easy
The image formed by a plane mirror is:
A. real and inverted
B. virtual and erect ✓ Correct
C. real and erect
D. always smaller
Solution: Plane mirrors give virtual, upright images.
Q3 — easy
The part of the eye that controls the amount of light entering is the:
A. cornea
B. iris ✓ Correct
C. retina
D. optic nerve
Solution: The iris adjusts the pupil size.
Q4 — easy
The screen of the eye where the image forms is the:
A. cornea
B. lens
C. retina ✓ Correct
D. pupil
Solution: The retina receives the image.
Q5 — hard
Two plane mirrors placed at 90° form how many images of an object?
A. 1
B. 2
C. 3 ✓ Correct
D. infinite
Solution: 360/90 − 1 = 3 images.
Q6 — hard
A person cannot see distant objects clearly. This defect is:
A. hypermetropia
B. myopia ✓ Correct
C. cataract
D. colour blindness
Solution: Myopia is short-sightedness.
Q7 — hard
Why do we see most objects around us even though they do not emit light?
A. They generate light
B. They reflect light into our eyes ✓ Correct
C. They absorb all light
D. Our eyes emit light
Solution: Vision depends on reflected light.
Q8 — medium
Reflection from a rough, irregular surface is called:
A. regular reflection
B. diffused reflection ✓ Correct
C. refraction
D. dispersion
Solution: Irregular surfaces scatter light.
Q9 — medium
Splitting of white light into its seven colours is called:
A. reflection
B. dispersion ✓ Correct
C. absorption
D. diffusion
Solution: A prism disperses white light.
Q10 — medium
The cells in the retina sensitive to dim light are:
A. cones
B. rods ✓ Correct
C. nerves
D. lenses
Solution: Rods work in low light; cones detect colour.
Q11 — medium
The script used by visually impaired people to read by touch is:
A. Morse code
B. Braille ✓ Correct
C. shorthand
D. Devanagari
Solution: Braille uses raised dots.