Most of us are familiar with positive-index lenses- in cameras, magnifying glasses, microscopes and telescopes.
Those drops act like mini magnifying glasses, focusing the sunbeams on an area that will subsequently fry.
Studies of nature or toys like pulleys, magnifying glasses, or binoculars are all ways for unschoolers to explore science.
Droplets clinging to the leaves can act as little magnifying glasses, focusing sunlight and causing the plants to burn.
As early as the 7th century B.C., people used simple magnifying glasses to concentrate the light of the sun into beams so hot they would cause wood to catch fire.
We always like to use microscopes to find our own troubles and pains, and use magnifying glasses to observe the happiness and happiness of others. So we tied ourselves to a knot in the depths of our soul, which is destined to be a life lost.
