light

LIGHT

Light moves in a straight line

Light moves very fast

light travels at 300,000 km per second.

Light and shadows

• The shadow of an objet is always formed on the opposite side to the source of light.

Colours

colours• 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.

mixtures• When we mixture yellow & blue,

we get: green. When we mixture red & blue we get : purple. When we mixture red & yellow we get: orange. we can make all the colours from just three colours: b l u e , red, and yellow. THESE ARE, THE PRIMARY COLOURS.

Bodies and light.

• Transparent

• Translucent

• Opaque

1. Transparent, translucent and opaque objets.

. Transparent objets, like clear glass bottles, allow light to pass through .

. Translucent objets, allow some light to pass through like, curtains

. Opaque objets, for example wood and cardboard do not allow light to pass trhough.

2.Luminous and non luminous bodies.

• Natural luminous bodies like the , produce light.

• Artificial luminous bodies, like & are man made.

Non luminous bodies produce no light.

heat

• 1. heat goes from one body to another. Heat goes from one body to another. Heat goes from hot bodies to colder bodies.

• 2. conductors and insulator. Materials like iron , aluminium and glass are conductors. They get hot quickly.

• Materials like wood and plastic are insulators. They get hot slowly.

test

• Light moves in a straight line.• light moves very slow.• the shadow of an objet is always formed on the

opposite side to the source of light.• White light is a mixture of four colours• when we mix red and yellow ge get orange• transparent objets do not allow light• Materials like iron aluminium and glass are

insulators. They get hot quickly.

solutions

• 1 . Yes , CONGRATULATIONS• 2 . No , fast • 3 . Yes , CONGRATULATIONS• 4 . No , seven• 5 . Yes , CONGRATULATIONS• 6 . No , allow light• 7 . No , conductors

THE END

MADE BY ANGELA