June 19, 2022
In this anisotropicplus video we compare four different types of glass lenses for ease of igniting ordinary copier paper in full sun. We also include two different sizes of ordinary magnifying glasses. The glass lenses were purchased on Amazon for around $20. United Scientific DEMO75 Glass Demonstration Lens Set, 6 Pieces, 75mm Diameter https://www.amazon.com/dp/B00ES3SIPY?psc=1&ref_=cm_sw_r_cp_ud_dp_HYD5T7B6XDQW9FP4RD2N
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