How does a solar cooker work?

Question: How does a solar cooker work?

Answer: A solar cooker works by concentrating some of the sun’s radiation (sunlight) to heat a small area that is somewhat thermally isolated from its surroundings. The sunlight is collected using reflecting panels that reflect the sun’s rays from a large area into a small area. That small area is then blocked from wind, which thermally isolates it by reducing air circulation with cooler air as much as possible so that as the heat absorbed in the space is not immediately lost to the air. The key is in collecting a large area of the sun’s visible radiation and converting it in to thermal energy, that is getting the material to absorb light and heat up in the process (which can be easily accomplished by almost any dark colored material), and then finally holding that thermal energy in a smaller space.

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