In an experiment, positions of light source and screen are fixed. An opaque object is taken closer to the source then the size of the shadow on the screen ___________.

will increase

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will decrease

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will remain same

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cannot be predicted

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Solution

The correct option is A will increase
The size of a shadow depends on the distance between source and the object as well as the distance between object and the screen. When an opaque obect is taken closer to a torch light then the amount of light blocked by the object is more. This means, a larger area on the screen has the absence of light, which cast a larger shadow on the screen.

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