Chapter 11 Light, Shadows and Reflections

  • Objects around us are of different types.
  • Some are opaque, transparent, translucent, luminous, non- luminous around us.
  • The objects which emits light are called as luminous whereas, which does not emit light are known as non- luminous objects.
  • The object in which the light can pass easily called as transparent whereas the objects from which lights can pass easily but we cannot see clearly are known as translucent objects.
  • The objects through which lights cannot pass are called as opaque objects.
  • When an object comes in the path of light then the dark structure is formed, called as shadow.
  • Reflection may be defined as, when an objects send light back to its path, then an image is formed is known as reflection. For example: image in the mirror, shadow in water etc.
  • Bright objects or images can be seen by a pinhole camera. It is made up of cardboard simply.
  • Light travels in the straight line, that’s why when any object comes in its path, it makes shadow.

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Exercise 1 ( Page No. : 114 )

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