What is a Shadow?

• A shadow is a dark area formed when an object blocks light. It appears on the side opposite to the light source.

No light = shadow formed.

How is a Shadows Formed?

• A light travels in a straight line.

• When an opaque object blocks light, a shadow is created.

• Example: Hand under sunlight.

Clarity of Shadows

• Clear (Sharp) Shadow:

  • Formed when the light source is small or near.

  • Example: Torchlight close to the object.

• Blurred (Faint) Shadow:

  • Formed when the light source is large or far.

  • Example: Cloudy day sunlight.

​Factors Affecting Clarity of Shadows

• Size of light source

• Distance between object and light source

• Distance between object and surface