If we put a source of light at $180 °$ position of the screen and a football in front of the screen or at $90 °$ position it will not forms a ____ on the screen.

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Detailed Solution

If we put a source of light at

18 0^{o}

position of the screen and a football in front of the screen or at

9 0^{o}

position it will not form a shadow on the screen.
Due to the fact that light moves in a straight line, there won't be a shadow created on the screen. The human eye can detect light, an electromagnetic radiation. When nothing is in its path, light moves in a straight line. Light can pass through transparent objects without affecting them. Opaque objects completely block the light from passing through them while transparent objects allow some light to pass through them.

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