THE LIGHT

CHARACTERISTICS OF LIGHTIt travels very fast

It travels in a straight lineIt travels in all directions

LIGHT COMES IN TWO SOURCES ARTIFICIAL LIGHT ( LIKE A TORCH)AND NATURAL LIGHT (LIKE FIRE).

Are these light sources?

moon

watermirror

These items are not light sources, instead they are reflecting light from other sources.

How do we see?

Light from a luminous object goes straight into our eyes.

Light from a luminous object reflects off a non-luminous object and into our eyes.

WHEN LIGHT IS TRAVELING ON THE AIR

AND CHANGES TO WATER IT GOES SLOWER

AND IT CHANGES DIRECTION. THAT IS CALLED

REFRACTION.

When light finds an object, it bounces off.

This is calledREFLECTION

Light can pass through transparent objects

Transparent objects allow you to see clearly through them. Some examples are:

Translucent objects only let some light through them. You cannot see clearly through a translucent object. Some examples are:

Opaque objects do not let any light through them. You cannot see through them. Some examples of opaque objects are:

WHEN THERE IS AN OBJECTBLOCKING THE LIGHT A

SHADOW IS FORMED

What colour is light?

• The white light we see is actually a mixture of different colours. With a prism, we can separate White light into its component colours (red, orange, yellow, green, blue, indigo and violet).

A TREE IS GREEN BECAUSEIT ABSORBS ALL THE COLORS

OF THE RAINBOW EXCEPTGREEN

Have a nice day