Introducing Light Explain the difference between • luminous and non-luminous objects.

Introducing Light
• Explain the difference between
luminous and non-luminous objects.
What objects can you see
from where you are sitting
that make their own light?
Luminous Sources
A luminous source is an object that can
create light.
Let’s see how many we
can name in 90 seconds!
Luminous Sources
The most important luminous source is
the sun.
Others include:
– Fire
– Electric Lights
– Fireworks
– Lightning
Non-Luminous Objects
Non-luminous objects do not create light.
So how are we able to see them?
We can see non-luminous
objects because of the light
reflected off of them.
Objects which make their own light are
……………………
Objects which do not make their own light are
……………………
Non-luminous objects
Luminous Source Worksheet
1. Circle the luminous sources
2. Label the luminous sources
3. Draw how the one-armed man would be
able to watch television.
4. Draw how the man would be able to see
the chair.
Answers
Properties of Light
• Light travels in straight lines:
Light travels VERY FAST
- About 300,000 kilometres per second.
Fact or Opinion?
What is the difference between fact and
opinion?
Clue: If it is a fact then you could prove it
is correct with an experiment!
Over many centuries, people have had
very different opinions about what light is
and how we see things.
Scientific Fact
Opinion
Which are fact and which are
opinion?
Light travels in straight lines.
An object has to be luminous to be visible.
Luminous objects give off light because
they are hot.
If you close your eyes then the universe
may not exist until you open them.
When you look at something, light travels
from your eyes to the object.
Under The Sea
Deep in the sea... It can be so deep that
light from the sun can not be seen.
How can animals survive down here?
Video Clip
Bioluminescence
Bioluminescence is where organisms are
able to create their own light.
These organisms are luminous sources.
Luminous Source Wipeout!
Find the 15 Luminous Sources
Avoid the Non-Luminous Objects!!!
 




 
 
 


MAGNESIUM
REACTING
WITH OXYGEN
TELEVISION
FLAME
MIRROR
NEON SIGN
OTHER
PLANETS
SWISS
CHEESE
GLASS
TORCH
DIAMONDS
RAINBOW
FIREWORKS
ANGLERFISH
AA BATTERY
THE HUMAN
EYE
LAMP
FIREFLY
REFLECTOR
JACKETS
COUNTRY
MUSIC
LIGHT BULB
SPARKLERS
THE MOON
LIGHTNING
THE SUN
STARS
BICYCLE
REFLECTORS
SNOW
COMPUTER
SCREEN
THUNDER
PLATINUM
EAR RINGS