Telescopes are made up of more elements than you might think. Let’s first study the different optical elements used today. I will keep the definitions as close as possible to the ones used in astronomical telescopes or even telescopes in general. Lens Lens is an optical element which converges or diverges light. A simple lens…

Before we get into the length and breadth of telescopes, let’s delve into the field of science that forms the core of these instruments – Optics. Many of you might have studied this science in high school and/or higher studies like me. Many might also need some brushing up of memory, again just like me….