Always learn new tricks.
by tonytran2015 (Melbourne, Australia)
This post shows how to set up a mirror and use it for quickly starting fire using moderate sunlight or for heating tiny dark components very cleanly using strong sunlight. The aim is to set up a low cost, robust, reliable system from common household items. The system serves as a useful fire lighting device composed of only two useful common devices (a mirror and a magnifying glass) in any prolonged emergency such as after a disaster.
The tiltable mirror allows alignment of its axis towards the Sun and its flat mirror combines with the magnifying glass to produce a tiny image of the Sun with all energy going through the magnifying glass converging on that tiny image.
The radiative heat flux from the Sun is concentrated by a factor C…
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