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.

Air Force Academy (AFA) at Dundigal has built a formidable reputation as the premier institution of Indian Air force. It is situated 43 km from Hyderabad since, Inception in 1971.

Astra is an active radar homing Beyond Visual Range Air to Air Missile (BVRAAM) developed by the Defence Research and Development Organisation (DRDO) India.

Trishul is the name of a short range surface to air missile developed by India as a part of the Integrated Guided Missile Development Programme. It has a range of 9 km and is fitted with a 5.5 kg warhead. Trishul flies in supersonic speed and has a low altitude sensitive radio altimeter and height lock loop control on board, to skim over the sea at a very low altitude and hit against sea skimming missiles coming towards our ships.

Koodan-Kulam Nuclear Power Plant (KKNP) is associated with Russia, which is located in Tirunelveli district of Tamil Nadu. KKNP is Indias first pressurised water reactor belonging to the light water category.