Class 8 Light CBSE Questions & Answers

Class 8 · Light

This is Science Class 8 Light CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
The mirror used as rear view mirror in vehicle is
  • A
    Convex mirror
    Correct
  • B
    Concave mirror
  • C
    Plane mirror
  • D
    Any one of above
2
The object which emits their own light are called
  • A
    Non-luminous bodies
  • B
    Light emitting objects
  • C
    Burning objects
  • D
    Luminous bodies
    Correct
3
Dentist use concave mirror because as it forms
  • A
    Magnified image
    Correct
  • B
    Inverted image
  • C
    Diminished image
  • D
    Erect image
4
If you stand before a plane mirror, your left hand appears right. This phenomenon is
  • A
    Diffusion of light.
  • B
    Shadow formation
  • C
    Lateral inversion of light
    Correct
  • D
    Reflection of light
5
Which type of mirror is used as concentrator in solar furnace?
  • A
    Bifocal mirror
  • B
    Plane mirror
  • C
    Convex mirror
  • D
    Concave mirror
    Correct
6
Speed of light
  • A
    Decrease in rarer medium
  • B
    Remain same in all medium
  • C
    Changes with medium
    Correct
  • D
    Increase in denser medium
7
In plane mirror, image formed is
  • A
    At same distance from the mirror
    Correct
  • B
    Half the distance of mirror
  • C
    Double the distance of mirror
  • D
    Anywhere behind the mirror
8
Objects are visible, when reflected light
  • A
    Bounce back from surface
  • B
    Comes out from the eyes
  • C
    Bends towards the normal
  • D
    Enters to our eyes
    Correct
9
When you stands in front of a small mirror. The image formed will appear to be of
  • A
    Smaller and erect
  • B
    Larger and inverted
  • C
    Same size and erect
    Correct
  • D
    Larger and erect
10
Which of the following object can acts and both converging and diverging mirror?
  • A
    Knife
  • B
    Polished floor
  • C
    Plane mirror
  • D
    Steel spoon
    Correct
11
A bundle of light rays is called a
  • A
    Bunch of light
  • B
    Pool of light
  • C
    Beam of light
    Correct
  • D
    Arrows of light
12
The image formed on cinema screen is an example of
  • A
    Erect image
  • B
    Real diminished image
  • C
    Virtual image
  • D
    Real image
    Correct
13
Which of the following physical quantity do not require medium for propagation?
  • A
    Light
    Correct
  • B
    Image
  • C
    Speed
  • D
    Sound
14
Which property of light enables us to see our face in mirror?
  • A
    Light is a form of energy
  • B
    Refraction of light
  • C
    Rectilinear propagation
  • D
    Reflection of light
    Correct
15
What is the name of phenomenon in which light change its direction after hitting the surface?
  • A
    Reflection of light
    Correct
  • B
    Bending of light
  • C
    Refraction of light
  • D
    Dispersion of light