Light

Things that give out light

Things that give out light are called sources of light. The Sun, stars, and fireflies are natural sources. Candles, bulbs, and torches are artificial

Luminous objects produce their own light

Luminous objects produce their own light, like the Sun or a glowing bulb. Non-luminous objects do not produce light; they only reflect light, like boo

Light moves in a straight path

Light moves in a straight path called a ray. This is why we cannot see around corners or through bent tubes.

Transparent objects (like glass) let all

Transparent objects (like glass) let all light pass through. Translucent objects (like butter paper) let some light pass. Opaque objects (like wood) b

A shadow forms when an opaque

A shadow forms when an opaque object blocks light. It is always dark and appears on the opposite side of the light source.