Page 153 - Science Class 06
P. 153

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              Light







               •  Luminous and Non-Luminous Objects                                •  Sources of Light

               •  Transparent, Translucent and Opaque Materials                    •  Shadow
               •  Solar and Lunar Eclipse          •  Reflec on of Light            •  Image
               •  Regular and Irregular Reflec on


              Light  can  be  a  number  of  different  things,
              depending on the circumstances. It can be
              the glow from a light bulb in your bedroom
              or  the  warm  shining  rays  that  beat  down
              from the sun. Light can

              be  natural  or  man-                                                 Luminous Objects
              made,  but  no  ma er
                                                                    They  are  called  non-luminous  objects.  The
              how  it  is  created,  we
                                                                    objects which do not produce light on their
              u lise light every single
                                                                    own are called non-luminous objects       .
              day.  Throughout  the
              past  century,  there
              have  been  a  number  of  scien fic  develop-
              ments revolving around light.

              LUMINOUS AND NON-LUMINOUS OBJECTS

              To see an object we need light. A candle, a
              torch, a lantern, an electric bulb or a tube                        Non-Luminous Objects
              are also the sources of light. Objects which
                                                                    The  sun  and  stars  are  luminous  bodies
              give  out  or  emit  light  are  called  luminous
                                                                    because they give us light. But, moon is a
              objects.  But  there  are  many  other  objects
                                                                    non-luminous body. It does not give light, it
              that  cannot  produce  light  such  as  paper,
                                                                    just  reflects  the  light  of  the  sun,  that  falls
              stones, wood, bricks, living organisms, etc.
                                                                    on it.
              Science-6                                                                                         153
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