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SIGMA PHYSICS TEACHER 🗿.

This giant Fresnel lens acts like a huge magnifying glass ☀️🔍.
By bending and focusing parallel rays of sunlight into a single focal point, it creates extreme heat — enough to burn wood, cook an egg, or even melt metal 🔥. The rainbow colors appear due to dispersion, where different wavelengths of light bend by different amounts.
The intense heating comes from the physics of energy concentration: sunlight spread over a large area is redirected and focused onto a tiny spot, greatly increasing the energy per unit area (power density). A powerful demonstration of solar energy and optics in action 🔬⚡."




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