Which of the following things are necessary for the formation of shadows?

Light source

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Heat

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Screen or wall

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Opaque or translucent object

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Solution

The correct options are
A Light source
C Screen or wall
D Opaque or translucent object
Shadows are formed only when light is blocked by an opaque or a translucent object.

A screen or a wall is required to cast shadows. They cannot be seen in the air.

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