In this post, some conceptual and numerical questions are asked to make your concept clear about the LASER. MCQ LASER PArt-2   Q 1      The output of the He-Ne laser lies in a.)   IR spectrum b.) visible spectrum c.) UV ...

MCQ ON LASER Q1. The emission process responsible for producing laser is a)Spontaneous emission b) stimulation emission   c.) ultraviolet emission  d.) infrared emission   Q2. For laser action to occur, the medium must have at least a.) Four energy levels ...