Science KS 3 Unit 8K Light

In this unit pupils:

• build on their knowledge of light and its effects.
• learn how we see objects.
• represent light as a ray and use this concept to explain reflection and refraction.
• find out about the origin of coloured light and the appearance of coloured objects.

In scientific enquiry pupils:

• consider why the spectrum described by Newton has seven colours.
• make and test predictions about the path of light.
• measure and record angles.
• identify and make predictions from patterns in data.
• investigate reflection and refraction at a plane surface.
• investigate the effects of coloured light on the appearance of objects.

Note:
Much of this work involves the interpretation and analysis of visual information gathered from a variety of sources. Visually impaired pupils will be able to take part in activities through careful use of their residual vision and sense of touch, as many light sources are also heat sources. Teachers could adapt the work on colour to ensure that any pupils with impaired colour vision can make a contribution that is valued by the rest of the class.

This unit is expected to take approximately 7.5 hours.

OTHER RESOURCES

• pictures showing luminous and non-luminous objects
• secondary sources to find out about optical devices and phenomena, including reference books and CD-ROMs
• software simulation of colour mixing
• datalogger and light sensor
• a range of glass blocks of different shapes
• coloured filters and objects
• laser (class 2)
• infrared remote control device, eg from audiovisual (AV) equipment