Shadow

The central darkest part of the shadow which does not receive any light from the source is called the ____________.

• Umbra

• Lenses

• Penumbra

• Eclipse

Choose all the factors on which the formation of shadow depends

• The distance between the source of light and the object

• Distance between the object and pinhole

• Distance between the pinhole and screen

• The distance between the source of light and the surface on which the shadow falls

Which of the following shadow is formed by an extended source of light

• 
• 

As the distance between the object from the source of light source decreases the size of the shadow ________. (answer only in capital letters)

As the distance between the _____________ and the surface on which the shadow falls increases the size of the shadow also increases. (answer only in capital letters)

Choose all the necessary condition for the formation of shadows.

• A source of light

• The shape of the object

• An object (opaque or transparent)

• The nature of the source of light