Shadow

What is Shadow:

Shadows are formed when light is stopped by an object. A dark shape on a surface that is caused by an object between the light and that surface , then a shade is formed behind it and this shade cast by an object is called its shadow.

Requirements to form a shadow?

1. Source of light.
2. An Opaque object ( to obstruct the path of light).
3. A screen on which the shadow can be seen.

Characteristics of a Shadow:

• It is always erect ( same side up as the object).
• Irrespective of the colour of the object, the shadow is always black.
• It can be smaller, equal or bigger than the object.
• Shadow is formed on the opposite side of source of light.
• Shadow is real because it can be formed on screen.