Page 2 - MM1

16.1 FORMATION OF SHADOWS

Learning Objective- Students will learn how and why the shadows are

formed.

Note:

 A shadow is a dark shape that is formed when an object comes in front of
a source of light.
 We can see shadows only in the presence of light. We cannot see it when
it is dark.

 Shadows are always formed on the opposite side of the object.
 The object blocking the path of light must be opaque or translucent to
make a shadow.

 A transparent object will not make any shadow, as the light will pass
through it.
 An object that does not let light through is called opaque.

 An object that allows the light to pass through is called transparent.
 Semi-transparent objects are known as translucent.

 Shadows are always dark.

Learning outcome- Students can tell how and why shadows are

formed.