A double-convex lens is compose of two convex surfaces, has a positive focal length. Normally Bi-Convex lenses are most suitable where the object and image are on opposite sides of the lens, and are ...

If you’re reading Hackaday, you’re probably intimately familiar with really small parts. 0201 resistors are tiny, and even smaller parts aren’t unheard of. The screws that go in your phone are ...

Glimpse worlds beyond our own with AG’s esteemed space expert and living legend, Fred Watson. Fred Watson is an honorary professor at Macquarie University and was Australia’s first Astronomer-at-Large ...

Introduction Have you ever studied an everyday object through a magnifying glass—and been amazed at what you could see? Or have you ever noticed, for example in a swimming pool, that an object that is ...