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
The reflection of light in a plane mirror or any other mirror takes place at
  • A
    Gold surface in it
  • B
    Black painting in it
  • C
    Red painting in it
  • D
    Silver surface in it
    Correct
2
Which of the following will not form circular shadow?
  • A
    A ball
  • B
    Shoe box
    Correct
  • C
    Ice-cream cone
  • D
    A circular disk
3
For a plane mirror angle between incident ray and normal is \({\text{4}}{{\text{5}}^0}\) than the angle of reflection will be
  • A
    \({\text{4}}{{\text{5}}^0}\)
    Correct
  • B
    More or less than \({\text{4}}{{\text{5}}^0}\)
  • C
    More than \({\text{4}}{{\text{5}}^0}\)
  • D
    Less than \({\text{4}}{{\text{5}}^0}\)
4
An real image is formed when light coming from it meet after passing through a mirror or lens
  • A
    Meets at a point
    Correct
  • B
    Meets opposite side of mirror
  • C
    Meets same side of the lens
  • D
    Moves away from the source of light
5
The angle of incidence is equal to angle of incidence
  • A
    Under special conditions
  • B
    Sometimes
  • C
    Never
  • D
    Always
    Correct
6
A ray of light is incident on a plane mirror making an angle of \({\text{9}}{{\text{0}}^0}\) with the mirror surface. The angle of reflection for this ray of light will be
  • A
    \({\text{6}}{{\text{0}}^0}\)
  • B
    \({\text{4}}{{\text{5}}^0}\)
  • C
    \({\text{9}}{{\text{0}}^0}\)
  • D
    \({0^0}\)
    Correct
7
When a rays of light from rarer to denser it will
  • A
    Bends towards the normal
    Correct
  • B
    Return into same medium
  • C
    Bend away from the normal
  • D
    Pass straight
8
In refraction, bending of light rays takes place at the
  • A
    End of the second medium
  • B
    Middle of the first medium
  • C
    Middle of the second medium
  • D
    Boundary of between two media
    Correct
9
Speed of light varies with
  • A
    Medium
    Correct
  • B
    Colour
  • C
    Particle nature
  • D
    Wave nature
10
Dispersion of light takes place due to
  • A
    Difference in refracting surface
  • B
    Difference in nature of light
  • C
    Difference in the wavelength
    Correct
  • D
    Difference in colour of light
11
Rainbow formation takes place due to
  • A
    Refraction and splitting of light
  • B
    Reflection and dispersion of light
  • C
    Reflection and refraction of light
  • D
    Refraction and dispersion of light
    Correct
12
All the rays of light parallel to principle axis after reflection pass through
  • A
    Mid point of lens.
  • B
    Focus
    Correct
  • C
    Pole
  • D
    Radius of curvature
13
In spectrum, the rays of light that bends least appear
  • A
    On top of spectrum
    Correct
  • B
    Middle of the spectrum
  • C
    Any where in the spectrum
  • D
    Bottom of the spectrum
14
Danger signals are red coloured because
  • A
    It can be seen by colour blinds
  • B
    It is most common colour
  • C
    It is a bright colour
  • D
    It scatter vary less
    Correct
15
Bodies which give out their own light is called
  • A
    Non-luminous body
  • B
    Burning body
  • C
    Luminous body
    Correct
  • D
    Illuminated body