Your task today is to investigate colour. You will use simulations to answer questions and investigate the properties of colour.

Colour

Click on the simulation run it. If it doesn’t work, use the link below the image instead.

Click to Run

Use the animation at the following address to test the hypothesis below: http://phet.colorado.edu/en/simulation/color-vision

Hypothesis:

An object will appear to be a certain colour because it reflects that colour back to our eyes while absorbing all other colours.

Method:

1.  Go to the “Single Bulb” section of the animation.

2.  Use the on/off button make the object appear then reappear.

3..  Move the slider at the bottom to change the colour of the object that the person is viewing.  The colour that they see can be seen in the though bubble above.

Discussion:

1.  What colour is seen when there is no filter?  Why is this colour seen?

2.  When the filter is purple what colour light does the eye detect?  When it is red?

3.  What colours of light hit the surface of the object?

4.  What happens to the other colours to make the object appear blue?

Conclusion:

Write a short paragraph which answers the following:

-Was the hypothesis correct?

-What allowed you to conclude the hypothesis was correct?

-Why do we do we see objects as being coloured?

Email your report to me when you have finished. (Use gmail through your moodle login, my email is bt@wellingtonsc.vic.edu.au)

Download this document and answer the questions. Email the document back to me when you have answered them.