Shadow Formation

What are the characteristics of a shadow?

_____ are caused by the shadows cast by heavenly objects.

A shadow can be obtained when there is 

What is the difference between the shadow of transparent, translucent and opaque objects?

Write an activity to show that a source of light is needed for the formation of a shadow.

A _____ is a dark space formed behind an opaque object.

Which of these will form the darkest shadow?

Draw the shadow formed in the following case. Explain the terms used in the diagram.

Draw the shadow formed in the following case. Explain the terms used in the diagram.

An extended source of light with an object smaller than the source kept in front of it.

The shadow of an object is always _____.

Shadow of an object can looks exactly the same as the object.

A shadow is formed on a screen when an object blocks the path of light.

Can you make a shadow by using a light source and a plane glass? Explain.

Explain penumbra and antumbra.

Deepu is of the opinion that solar and lunar eclipses occur because the earth and the moon are opaque. Do you agree with this? Explain.

Transparent objects do not cast shadows.

What is meant by a shadow?

A region of darkness or partial light is called _____.

Geeta placed three objects made of different materials as shown in the figure. She observed a bright spot of light at (II) but (III) would not get any spot. Then,

Three sticks are placed in an open field as shown in figure. Which of the following sticks will form the shadow of equal length?