Question

How shadow are formed​

Answer 1

Basically an object that does not allows any light to pass through will form a shadow. Shadows are formed by light, because if light shines onto an object, and the object blocks the light, the light will go sideways of the object, and therefore, a shadow is formed. Light can only travel in straight lines.

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Answer 2

Basically an object that does not allows any light to pass through will form a shadow. Shadows are formed by light, because if light shines onto an object, and the object blocks the light, the light will go sideways of the object, and therefore, a shadow is formed. Light can only travel in straight lines.