Shadows

Key Notes:

What is a Shadow?

A shadow is a dark shape that forms when an object blocks light.

How are Shadows Formed?

Shadows are made when light cannot pass through an object (like your body or a toy).

Need for Light Source:

A shadow needs a source of light, such as the Sun, a lamp, or a torch.

Opaque Objects Make Shadows:

Objects that don’t let light pass through (called opaque objects) create shadows.
Examples: Book, tree, person.

Transparent Objects Don’t Make Shadows:

Objects that let light pass through (called transparent objects) do not make clear shadows.
Examples: Glass, clean plastic.

Shadow Shape:

The shape of the shadow is usually similar to the shape of the object blocking the light.

Shadow Size Changes:

• If the object is closer to the light, the shadow becomes bigger.
• If the object is farther from the light, the shadow becomes smaller.

Shadow Direction Changes:

• The direction of the shadow depends on the position of the light source.
• Morning and evening: Shadows are long.
• Midday: Shadows are short.

Shadows Move:

Shadows change position when the light source or the object moves.

Fun Fact:

Your shadow is always with you when you’re in the light – it follows you!