CBSE  /  Class 8  /  Science  /  Light

  • 1. 
    A smooth shining surface, which rebounds the light back in same or in different direction, is called

  • a mirror
  • a lens
  • reflection of light
  • point of incidence

  • 2. 
    Beam of light striking the reflecting surface is called

  • reflecting ray
  • incident ray
  • refracted ray
  • normal ray

  • 3. 
    Band of seven colours is called

  • VIBGYOR
  • spectrum
  • dispersion
  • reflection

  • 4. 
    Front balged part of the eyeball is called

  • cornea
  • choroid
  • pupil
  • retina

  • 5. 
    Which one of the following statements is correct regarding rods and cones in the human eye?

  • Cones are sensitive to dim light
  • Cones are sensitive to bright light
  • Rods are sensitive to bright light
  • Rods can sense colour

  • 6. 
    In case of reflection of light, the angle of incidence (i) and the angle of reflection (r) are related as

  • i = r
  • i < r
  • i > r
  • no definite relation

  • 7. 
    Name the type of mirror used as a backview mirror.

  • Plane mirror
  • Concave mirror
  • Convex mirror
  • Any of these

  • 8. 
    Visually impaired people can read and write using

  • electronic writer
  • digital pens
  • braille system
  • hearing aids

  • 9. 
    The image formed by a camera and a simple microscope are respectively

  • real and real
  • real and virtual
  • virtual and virtual
  • virtual and real

  • 10. 
    What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?

  • 60°
  • 45°
  • 90°
  • 180°
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