Flat Mirror (or Plane Mirror): Reflects light without distorting the image. The image formed is erect (upright) and of the same size as the object, but reversed from left to right.

Convex Mirror: Also produces an erect image. The image formed is virtual (cannot be projected onto a screen), smaller than the actual object, and upright.

Both flat and convex mirrors can create upright (erect) images of real objects.

Dr APJ Abdul Kalam is the undisputed father of India’s missile programme. He was breathed life into ballistic missiles like the Agni and Prithvi. It is too exhausting to track Dr Adbul Kalam’s achievements to date. In the 60s and 70s he was a trail blazer in the space department. In the 80s, he transformed the moribund Defence Research and Development Laboratory in Hyderabad into a highly motivated team.

By the 90s, Kalam emerged as the Czar of Indian Science and technology and was awarded the Bharat Ratna and served as the 11th President of India 2002 to 2007.