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Light Science - Light

Jharkhand Board (JAC) - STD 8 - Science (Jharkhand - English Medium). 122 questions in this chapter.

Question types

Light question types

122 questions across 6 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

122
Questions
6
Question groups
5
Question types
Sample Questions

Light questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q. [I MARKS]1 Mark
The deficiency of one of the following in the diet of a person for a considerable time can lead to a disease called night blindness. This one is:
  • A
    Vitamin $B.$
  • B
    Vitamin $D.$
  • ✓
    Vitamin $A.$
  • D
    Vitamin $C.$

Answer: C.

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Q 2M.C.Q. [I MARKS]1 Mark
The number of images formed of an object placed between two plane mirrors inclined at right angles to each other is:
  • A
    Two
  • B
    Five
  • C
    One
  • ✓
    Three

Answer: D.

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Q 5M.C.Q. [I MARKS]1 Mark
The defect of vision in which the eye$-$lens of a person gets progressively cloudy resulting in blurred vision is called :
  • A
    Myopia.
  • B
    Night blindness.
  • ✓
    Cataract.
  • D
    Hypermetropia.

Answer: C.

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Q 7Fill in the blanks: [1 M]1 Mark
Fill in the following blanks with suitable words:
In a movie, the still pictures in proper sequence are projected on the screen usually at the rate of $............$ pictures per second.
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Q 20questions in short. [3 marks ]3 Marks
What is the difference between regular reflection and diffuse reflection of light? Name one object which can produce regular reflection of light and another which produces diffuse reflection of light.
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Q 27questions in details [4 marks ]4 Marks
Name the part of the eye:
$a.$ Which controls the amount of light entering the eye.
$b.$ Which converges light rays to form the image.
$c.$ On which image is formed.
$d.$ Which carries the image to brain.
$e.$ Which changes the curvature $($or thickness$)$ of eye$-$lens to focus objects lying at various distances.
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Q 28questions in details [4 marks ]4 Marks
Name the part of the eye:
$a.$ Which controls the amount of light entering the eye.
$b.$ Which converges light rays to form the image.
$c.$ On which image is formed.
$d.$ Which carries the image to brain.
$e.$ Which changes the curvature $($or thickness$)$ of eye$-$lens to focus objects lying at various distances.
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