Hello I am working on a physics project and I would like to ask for help:

MAKE A USEFUL SIMPLE TECHNOLOGY THAT USES THE PROPERTY OF LIGHT AS A WAVE AND AS A PARTICLE.

1. Define the property or properties of light that was used in the technology
2. Demonstrate how the technology works
3. Show how the property/properties of light was used in the technology
4. Explain how these properties show evidence that light is a wave or particle or both
5. (Give examples and counter examples)Explain how this technology is useful

These are the list of things I need to say in my presentation and I would like to ask for help on what I can make for this project (something that is not really hard to make) and please answer the following 1-5 thanks, also l if you can please leave a source where you got your imformation