PowerPoint Presentation

How does light travel?Light And shadow

1) To know what a source and reciever are.2) Demonstrate how light travels.3) Know that light can reflect.

Steps to Success

Source or Reciever?The thing that makes light is called the source.The thing that sees the light is called the receiver.But how does the light get to my eyes?What do you think?a) Straight linesb) In bendy linesLets use a torch and card-slot to prove it.

Lets practiceMirrors

Shine a torch onto a mirror. Draw the direction of the light going to the mirror.Draw the line reflecting off the mirror

What do you notice?Click me for an extensionHow do we see objects?

To see objects we need lightI can see that turtle hiding because the sun is providing the light.But which way is correct A, B or C?A

B

C

Your Task

1) Look at the diagram of a light source showing an object to a person.2) Complete this explanation using the words below:

The sun (___________) is making _____________. The light travels in __________________ and hits the turtle. The light then ____________ towards the persons eye.SourceReflectsLightStraight linesFinal Thing

It says here that people use reflecting light to help them see.