2.LIGHT AND SHADOWS
When light cannot travel through an object ,a shadows is
formed on the opposite side to the source of light.
The light we get from the sun is called white light .
White light is a mixture of seven colours:
red,orange,yellow,green,blue,indigo and violet.
TRANSPARENT,TRANSLUCENT AND OPAQUE OBJECTS
We divide objects into three groups depending on how much
light can pass through .
Transparent objects , like clear glass bottles , allow light to
pass through .
Translucent objects, like curtains, allow some light to pass
Opaque objects, for example wood and cardboard , do not
allow light to pass through .
LUMINOUS AND NON-LUMINOUS BODIES
Some objects are sources of light.
Natural luminous bodies, like the Sun, produce light.
Artificial luminous bodies, like candles and matches , are
Non luminous bodies produce no light. Some of them can
reflect light, like mirrors.