Class 7 Light CBSE Questions & Answers

Class 7 · Light

This is Science Class 7 Light CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
White light consist of
  • A
    5 colours
  • B
    3 colours
  • C
    9 colours
  • D
    7 colours
    Correct
2
Band of seven colour of light appeared on screen when white light passes through is prism is called
  • A
    Refractive index
  • B
    Angle of deviation
  • C
    Colour band
  • D
    Spectrum
    Correct
3
Real image is always
  • A
    Inverted and diminished
  • B
    Erect
  • C
    Inverted
    Correct
  • D
    Erect and enlarged
4
In a concave mirror the reflecting surface is
  • A
    Bent-in surface
    Correct
  • B
    Uneven surface
  • C
    Bulging out surface
  • D
    Plane surface
5
Plane mirror always form image that is
  • A
    Real and inverted and larger than object
  • B
    Virtual, erect and same size of object
    Correct
  • C
    Real, erect and smaller than object
  • D
    Virtual, inverted and same size of object
6
Bodies which give out their own light is called
  • A
    Non-luminous body
  • B
    Luminous body
    Correct
  • C
    Burning body
  • D
    Illuminated body
7
____________ refers to collection of rays.
  • A
    Image
  • B
    Photon
  • C
    Beam
    Correct
  • D
    Shadow
8
All the rays of light parallel to principle axis after reflection passes through
  • A
    Pole
  • B
    Mid point of lens.
  • C
    Radius of curvature
  • D
    Focus
    Correct
9
Sky appear red during
  • A
    During noon
  • B
    Sunrise and sunset
    Correct
  • C
    During early noon
  • D
    During day
10
The mirror used as rear view mirror in vehicle is
  • A
    Concave mirror
  • B
    Any one of above
  • C
    Convex mirror
    Correct
  • D
    Plane mirror
11
Rainbow is formed due to ____________ light through tiny water droplets.
  • A
    Dispersion
    Correct
  • B
    Refraction
  • C
    Reflection
  • D
    Scattering
12
Which one is a transparent object?
  • A
    Dense fog
  • B
    Wax paper
  • C
    Stone
  • D
    Reading glass
    Correct
13
In convex mirror, the reflection of light takes place at
  • A
    Flat surface
  • B
    Bulging out surface
    Correct
  • C
    An uneven surface
  • D
    Bent in surface
14
A diverging mirror is
  • A
    A concave mirror
  • B
    A convex mirror
    Correct
  • C
    A plane mirror
  • D
    A shaving mirror
15
In regular reflection, angle of incidence is always equal to
  • A
    Angle of deviation
  • B
    Angle of refraction
  • C
    Angle of emergence
  • D
    Angle of reflection
    Correct