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It's possible to do it with ice that has been shaped into a convex lens. The ice needs to be clear and fairly large like 5 inches across. Obviously this won't work in the summer, and the cold tempe...
Answer
It's possible to do it with ice that has been shaped into a convex lens. The ice needs to be clear and fairly large like 5 inches across. Obviously this won't work in the summer, and the cold tempe...