Light

Key Notes:

What is Light?

• Light is a form of energy that helps us see things.
• It travels in a straight line.

Sources of Light

• Natural sources: Sun, stars, fireflies.

• Man-made sources: Bulbs, candles, torches.

The Sun – Our Main Source of Light

• The Sun gives us natural light during the day.
• It also gives heat and helps plants grow.

How Light Helps Us

• We can see objects because light reflects off them into our eyes.
• It helps us stay safe and do our daily activities.

Light and Shadows

• A shadow is formed when an object blocks light.
• Shadows are always formed on the opposite side of the light source.

Transparent, Translucent, and Opaque Objects

• Transparent: Allows all light to pass through (e.g., clear glass).
• Translucent: Allows some light to pass through (e.g., frosted glass).
• Opaque: Blocks all light (e.g., wood, metal).

Reflection of Light

• Light bounces off shiny surfaces like mirrors.
• This bouncing back of light is called reflection.

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🧠 Fun Fact:

• The Moon does not have its own light—it reflects sunlight!