Electronic Flash differs from the consumable bulb flash in important aspects. Instead of creating light by burning up in an atmosphere containing oxygen, a consumable material (each bulb being used therefore only once), it produces a brilliant incandescent by discharging a current for a brief instant through a rarified gas, usually xenon. The gas glows every time the discharge is made through it but it is not consumed, so that many thousands of flashes are obtainable from a single tube, which helps to offset the much higher cost of the initial apparatus.

Nirbhay missile is India's first indigenously designed and developed long range sub-sonic cruise missile.It is designed and made by DRDO (Defence Research & Development Organisation).The Nirbhay missile can be deployed from multiple platforms.