CBSE  /  Class 10  /  Science  /  Light Reflection and Refraction

  • 1. 
    A student used a device (X) to obtain/focus the image of a well illuminated distant building on a screen (S) as shown alongside in the diagram. Select the correct statement about the device (X).

  • This device is a concave lens of focal length 8 cm.
  • This device is a convex mirror of focal length 8 cm.
  • This device is a convex lens of focal length 4 cm.
  • This device is a convex lens of focal length 8 cm.

  • 2. 
    A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distances should he measure to get the focal length of the mirror?

  • MW
  • MS
  • SW
  • MW- WS

  • 3. 
    The mirror having reflection surface curved outward

  • plane mirror
  • concave mirror
  • convex mirror
  • cylindrical mirror

  • 4. 
    The mirror having reflecting surface curved inwards

  • plane mirror
  • convex mirror
  • cylindrical mirror
  • concave mirror

  • 5. 
    The mirror used as rear-view mirror in vehicles

  • convex mirror
  • plane mirror
  • cylindrical mirror
  • concave mirror

  • 6. 
    The deviation of light ray from its path when it travels from one transparent medium to another transparent medium is called

  • reflection
  • refraction
  • dispersion
  • scattering

  • 7. 
    Convex lens is also known as

  • converging lens
  • diverging lens
  • radial lens
  • axial lens

  • 8. 
    The image which is formed behind the mirror

  • real image
  • virtual image
  • blue image
  • partial image
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