Question

Why does the shadow appear circular when we move the sheet TOWARDS THE SUNLIGHT

Answer 1

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An opaque object blocking the path of light is called a shadow. A shadow is a dark region, and is formed only when a light source, an opaque object and a screen are present.

Opaque objects form shadows because light is not able to bend around them.Shadows are seen more clearly on light screens. Whatever the colour of the object, its shadow is always black because it is not illuminated by light. The length and shape of a shadow depends on the object by which it is formed.