Mention the conditions required for shadow formation

Dear Student,


Conditions for the formations of shadows are 

1. A light source, an opaque obstacle, a screen.

2. Umbra, that is the dark part (shown in the above figure by the dark triangular shape) of the shadow must fall on the screen. 


  • 1
The following three things are required for a shadow to form:?a source of light.?an opaque object.?a screen or surface behind the object.
  • 2
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