India has 29 states with at least 720 districts comprising of approximately 6 lakh villages, and over 8200 cities and towns. Indian postal department has allotted a unique postal code of pin code ...

The ion trap of the new In+/Yb+-crystal clock in its vacuum chamber. The Ions are trapped in the gap that can be seen in the middle of the picture between the gold electrodes (target). A shown-up ...