Investigate how light shines through different materials.
Early Learning Goal links
Understanding the World ELG: Past and Present – Talk about the lives of the people around them and their roles in society;
Understanding the World ELG: The Natural World – Understand some important processes and changes in the natural world around them, including the seasons and changing states of matter.
Expressive Arts and Design ELG: Creating with Materials
– Safely use and explore a variety of materials, tools and techniques, experimenting with colour, design, texture, form and function;
– Share their creations, explaining the process they have used;
STEM vocabulary to introduce
Light, dark, shadow, source, block, change, shape, travel, long, short, big, small, straight, solid (opaque), see-through (transparent), translucent (you can see light through it but not clear shapes), colours- bright, dim, fuzzy, clear
How to make the light box
If your fairy lights use mains power, drill a hole in the box near the bottom and a corner. You will need it to be big enough to slide your lights through into the box, while the plug remains outside the box.
Spread out the lights at the bottom of the box. the more sets of lights you can use, the more effective the light box.
Turn the lights on. If you can see the shape of the lights clearly through the lid, you need to line your lid with tracing paper or grease proof paper to make it translucent (the light shines through but you can’t see a clear shape). Put the lid back on and you are ready to go.
What to do
Show the children the lighting technician poster. Tell the children that lighting technicians are creative and you want them to observe and investigate the different patterns, shapes and colours they can create on the light box with the different materials and objects.
Questions to ask to support and extend learning
- Which objects do you like the best? Why?
- Which objects does the light shine through?
- Which objects block the light?
- Which objects make the light change colour when it shine through them?
- Can you create a picture or pattern?
- What happens when you put tracing paper over an object or material?
- Can you use the tracing paper to trace any of the objects or materials?
- What happens when you use colours on your tracing paper?
Other things to try
Remember to refer to the children as lighting technicians and praise them for using the attributes. You could say things like:
“You have been observant like a lighting technician and noticed what happened when you put that material on the light box…”
“Well done, you have been really creative in the way you used those materials to change the way the light looks …”
The science of light boxes
We have put together some useful information about the science of light boxes to accompany this activity. Don’t worry this is for your information only and to help you answer any questions children may have. We don’t expect you to explain this to the children in your setting!
Why do some of the materials let the light through?
The light we see is made up of the different colours of the spectrum, these are the colours of the rainbow. Before Isaac Newton (1643 – 1727) when people talked about the rainbow they only included 5 colours – there was no orange or indigo. Newton added in two extra colours because he thought that 7 was a perfect number!
Some of the materials you used are transparent – we could see through them and they let all of the light through them. Examples are clear plastic, cellophane, water and glass.
Some of the materials you used are translucent. This is when materials absorbs part of the light but allows part of the light through. The light that travels through the material is scattered so that you cannot see clearly through the material. Examples are tissue paper and frosted glass.
For both transparent and translucent materials, if your material looked green, it only let green light through and absorbed all the other coloured light. If your material was red, it only let red light through and so on.
Some of the materials you used were opaque – they absorbed all the light. Examples are wood, thick plastic and metal.
Why did the light shine more brightly through some materials?
Some of the materials absorb less of the light and ley more of the light through. This makes the light look like it is shining more brightly through those materials.
What you’ll need
- A translucent storage box with a lid
- Fairy lights
- If you are using fairy lights with a plug, you will need to drill a hole in your box
- A selection of opaque, translucent, and transparent objects
- Tracing paper, pencils and coloured pencils, crayons or felt tip pens
- The lighting technician poster
- 10 minutes or so to make the box
- 10 minutes for the activity