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 blue colour of sky during day is due to
  • A
    Refraction of light
  • B
    Diffraction of light
  • C
    Dispersion of light
  • D
    Scattering of light
    Correct
2
White light consist of
  • A
    3 colours
  • B
    5 colours
  • C
    9 colours
  • D
    7 colours
    Correct
3
Image of a tree situated at far distance is obtained using concave lens. The image will be formed at
  • A
    Focus of mirror
    Correct
  • B
    Between focus and pole
  • C
    At the pole of the mirror
  • D
    Centre of curvature
4
We can see an object when it
  • A
    Refract or absorb the rays of light
  • B
    Has bright colour
  • C
    Reflect or emit rays of light
    Correct
  • D
    Has shining surface
5
If you stand before a plane mirror, your left hand appears right. This phenomenon is
  • A
    Reflection of light
  • B
    Lateral inversion of light
    Correct
  • C
    Shadow formation
  • D
    Diffusion of light.
6
Which of the following statement is incorrect?
  • A
    Light travels in straight line
  • B
    Light travels faster in rarer medium
  • C
    Light can pass through all material
    Correct
  • D
    Light is form of energy
7
Light rays enters the room during day due to
  • A
    Diffused refraction
  • B
    Regular refraction
  • C
    Regular reflection
  • D
    Diffused reflection
    Correct
8
The rays of light that falls on mirror surface is called
  • A
    Incident ray
    Correct
  • B
    Reflected ray
  • C
    Refracted ray
  • D
    Normal to surface
9
The image formed on cinema screen is an example of
  • A
    Erect image
  • B
    Virtual image
  • C
    Real diminished image
  • D
    Real image
    Correct
10
The angle between mirror and incident ray is than angle of reflection will be
  • A
    \({\text{9}}{0^0}\)
  • B
    \({\text{4}}{0^0}\)
  • C
    \({\text{5}}{0^0}\)
    Correct
  • D
    \({\text{4}}{{\text{5}}^0}\)
11
When light bounces off a surface, the surface is
  • A
    Transparent
  • B
    Reflector
    Correct
  • C
    Translucent
  • D
    Opaque
12
The radius of curvature of a concave mirror is 30 cm. The focal length of the mirror will be
  • A
    10 cm
  • B
    20 cm
  • C
    30 cm
  • D
    15 cm
    Correct
13
The lens present in human eye is made up of
  • A
    Plastic
  • B
    Glass
  • C
    White rubber
  • D
    Transparent protein
    Correct
14
The perpendicular to the reflecting surface is called
  • A
    Incident rays
  • B
    Normal
    Correct
  • C
    Reflected rays
  • D
    Refracted rays
15
The word ambulance is written as below on patient carrying vehicle because Rear view mirror of ahead vehicle
Question 15 figure 1
  • A
    Forms real and inverted image
  • B
    Forms virtual and erect image
  • C
    Forms erect and laterally inverted image
    Correct
  • D
    Forms real and magnified image.