Class 8 – Science Question Paper
Chapter: Light
Maximum Marks: 50
Time: 1½ Hours
Section A – Multiple Choice Questions (1 mark each × 5 = 5 marks)
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Which of the following is a luminous object?
(a) Moon
(b) Candle flame
(c) Table
(d) Mirror -
The angle between the incident ray and the normal is called:
(a) Angle of reflection
(b) Angle of incidence
(c) Angle of deviation
(d) Angle of prism -
In which type of reflection are the reflected rays not parallel?
(a) Regular reflection
(b) Diffused reflection
(c) Multiple reflection
(d) Total internal reflection -
The image formed by a plane mirror is:
(a) Real, inverted, smaller
(b) Virtual, erect, same size
(c) Real, erect, magnified
(d) Virtual, inverted, same size -
The blind spot in the human eye is the point where:
(a) Only rods are present
(b) Only cones are present
(c) No sensory cells are present
(d) Maximum cones are present
Section B – Assertion and Reason (1 mark each × 4 = 4 marks)
For each question, select the correct option:
(A) Both assertion and reason are true, and reason is the correct explanation.
(B) Both assertion and reason are true, but reason is not the correct explanation.
(C) Assertion is true but reason is false.
(D) Assertion is false but reason is true.
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Assertion (A): The angle of incidence is equal to the angle of reflection.
Reason (R): This is the first law of reflection. -
Assertion (A): We can see the moon because it emits its own light.
Reason (R): The moon shines by reflecting the sunlight falling on it. -
Assertion (A): Kaleidoscope shows beautiful patterns due to multiple reflections.
Reason (R): It uses two concave mirrors arranged in a prism. -
Assertion (A): The pupil becomes large in dim light.
Reason (R): A large pupil allows more light to enter the eye.
Section C – Fill in the blanks (1 mark each × 4 = 4 marks)
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The ray of light striking a surface is called the ________.
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The splitting of white light into seven colours is known as ________.
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The part of the eye which controls the amount of light entering is the ________.
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________ developed the Braille system in 1821.
Section D – True/False (1 mark each × 4 = 4 marks)
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A plane mirror always forms a real image. (______)
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In regular reflection, parallel rays remain parallel after reflection. (______)
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Rods in the retina are sensitive to bright light. (______)
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Night blindness is caused due to deficiency of Vitamin A. (______)
Section E – Very Short Answer Questions (2 marks each × 5 = 10 marks)
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Define lateral inversion with an example.
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State the two laws of reflection.
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Differentiate between luminous and illuminated objects with examples.
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What is the function of rods and cones in the human eye?
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Why should we not look directly at the Sun?
Section F – Short Answer Questions (3 marks each × 3 = 9 marks)
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Draw a labelled diagram of the human eye. Write the function of:
(a) Cornea, (b) Retina, (c) Iris. -
Differentiate between regular reflection and diffused reflection with neat diagrams.
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Explain with activity how we can prove that angle of incidence = angle of reflection.
Section G – Long Answer Questions (5 marks each × 2 = 10 marks)
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(a) Describe the construction and working of a periscope.
(b) Write two uses of it in daily life. -
(a) Explain the Braille system.
(b) Mention any two achievements of visually impaired persons discussed in the chapter.
Class 8th Science – Light | NCERT Question Paper by The Busy Brains
