Experimental physics is challenging and fun. Scientific and technological progress in the modern world could not be imagined without careful experiments on semiconductors in the last 7 - 8 decades. As a result, semiconductors form hearts and brains of modern computation, optoelectronic and lightwave technologies. In this talk, I will describe experiments on semiconductors using light and strong magnetic fields which have provided vital tests to the theories of quantum mechanics. Classic textbook quantum phenomena such as 'particle in a box' and confinement effects, quantum mechanics of artificial hydrogen atoms etc. are routinely studied in the laboratory through such experiments. We will discuss the strongest magnetic fields which have been created in a laboratory. Alongside, recent progress in the area of research will be described, where every year, many fascinating discoveries are taking place setting up foundations of future quantum computation and communication technologies.