Answer:
When an opaque object is placed in the path of light then the light is obstructed by an object leading to the formation of a dark patch known as shadow of that object, which can be taken on a screen placed behind it. To form a shadow, there must be (i) a light source (ii) a screen (iii) an opaque object placed between the light source and the screen. For shadow formation, we can follow the given steps- Step 1: Take an opaque object. Step 2: Throw light on it from a light source. Step 3: Put a screen behind the object. In this way, a shadow of an object can be obtained on the screen.
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