Power is one of the most important factors to all the kind of development esp.industrial development.In this connection fuel is one that power is obtained from.Nowadays,conventional fuel like wood,oil,etc lack to satisfy our needs for power.We can get it from uranium and thorium too, for it is available in abundance.On the other hand,the sun is also a great source of energy.What do we have to do? Simply, we have to gather and harness it.These days,scientists are also in the search of finding out some effective methods to harness power as it is a key to all kinds of development.