Canadian teenager invents flashlight powered by heat of human hand

The video tutorial explains the use of the thermoelectric effect to generate voltage. It describes embedding tiles in an aluminum tube, where the hand provides heat and airflow through the tube offers cooling. The design is completed with a PVC tube for insulation and a low-power LED light.

What is the thermoelectric effect used for in the design described?

Describe the role of the aluminum tube in the design.

How does the airflow through the tube contribute to the overall function of the design?

Explain how the heat produced by the hand interacts with the cooling effect provided by the airflow.

What materials are mentioned for insulation in the design?