CBSE  /  Class 10  /  Science  /  Human Eye and Colourful World

  • 1. 
    Type of lens used in correction of myopia

  • convex lens
  • concave lens
  • reflecting lens
  • bifocal lens

  • 2. 
    Type of lens used in correction of hypermetropia

  • concave lens
  • reflecting lens
  • bifocal lens
  • convex lens

  • 3. 
    Myopia may arise due to

  • excessive curvature of the eye lens
  • elongation of the eyeball
  • both (a) and (b)
  • none of these

  • 4. 
    In an experiment to trace the path of a ray of light through a glass prism for different values of angle of incidence a student would find that the emergent ray:

  • is parallel to the incident ray
  • is perpendicular to the incident ray
  • is parallel to the refracted ray
  • bends at an angle to the direction of incident ray

  • 5. 
    While performing the experiment to trace the path of a ray of light passing through a glass prism, four students marked the incident ray and the emergent ray in their diagrams in the manner shown below.

  • I
  • II
  • III
  • IV

  • 6. 
    A dark muscular membrane which controls size of pupil

  • eye
  • iris
  • cornea
  • retina

  • 7. 
    Least distance of distinct vision for normal eye is

  • 25 cm
  • 50 cm
  • 75 cm
  • infinity

  • 8. 
    Farthest point of a normal eye is

  • 25 cm
  • 50 cm
  • 75 cm
  • infinity

  • 9. 
    Crystalline lens of people at old age becomes milky and cloudy. This condition is called

  • myopia
  • lever
  • cataract
  • presbyopia

  • 10. 
    The splitting of light into its component colours is called

  • Spectrum
  • Dispersion
  • Tyndall effect
  • Refraction
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