Photovoltaic, What and How ???

What is the photovoltaic? and How do this work? For some people, these questions will be difficult but for some people it is the easy question. By this poster, we hope that the knowledge about photo voltaic for some people well be better. Then, more people will think that its very awesome think that can be used for generate power. We hope that can be true and the implementation of photoviltaic will knowed.