When you look into a solar cooker, the visible light inside doesn't seem to be that much brighter or more concentrated than the sunlight striking us as we stand and look in. Our bodies are certainly not getting hot enough to burn, much less cook, so intuition tells us that food in the oven wouldn't cook either.
...You can use your eyes to see the visible light, your skin to feel the infrared light, and your imagination to see the way the light is transformed and then trapped inside the oven.
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