Light
Light
WALT: about the different properties of light.
WALT: about the different properties of light.
26/01/22
26/01/22
Shadows
Shadows are places where light is “blocked”:
Rays of light
How does light travel?
How does light travel?
• Light does not need air to travel though.
• Sound does need air to travel through.
• http://www.youtube.com/watch?v=ce7AMJdq0Gw
26/01/22
Seeing objects Seeing objects
How do we see an object?
The light from the object enters our eye.
Do we see all objects in the same way?
There are two ways we see objects…..
• We see some objects by reflected light.
• We see other objects because they are light sources.
Light sources
How do light rays from a light bulb and other light sources reach our eye?
They travel in a straight line
directly into our eye.
Reflected light Reflected light
How do light rays from a book and other such (non-luminous) objects reach our eye?
Light from the lamp or another light source
strikes the book and some of the light is reflected into our eye.
What happens when light hits What happens when light hits
something?
something?
Transparent – light travels through
Translucent – some light travels through but some is stopped.
Opaque – light cannot travel through it. These materials cause shadows
26/01/22
Groups Groups
1 2 3 4 5
Sophia Christian Letizia Thomas Charlotte S
Gini Andre Lara Valentin Isabella
Vivi Alexander Chiara Sebastian Nora
Marie Max Charlotte K Raphael Katarina
Activity Activity
• Use your torch to explore different materials.
• Which materials are;
• Opaque
• Translucent
• Transparent
26/01/22
Reflection Reflection
• When light hits an object it may be reflected.
• Reflection means a change of direction in the ray of light at an interface (surface).
26/01/22
Reflection : Good or Poor?
Arrange these items along the arrow:
White Paper
Red Roses
Polished Black Shoes Al foil
Yellow Banana
Blue Car
Tree Bark
Tangerine Green
Leaf Tarmac Road
Best
Reflectors
Worst Reflectors
